CASE 15
The Regime That Generated Almost All Your Profits
The backtest earns +80R across twelve years. Seventy-four R came from three crisis-trend months representing only 8% of trading days.
Validation verdict for regime profit concentration
Calendar length is not regime diversity. A strategy can span a decade yet owe almost all profit to one short environment. Robustness requires knowing which state paid, which states taxed and whether the profitable state appeared more than once.
What the headline metric obscures about regime profit concentration
A twelve-year equity curve appears broad because it covers many dates. The total hides that most years contributed nothing and one exceptional volatility regime created the upward step.
If the strategy was designed to harvest exactly that rare regime, concentration is not automatically a defect. The risk is presenting the full-period average as if the edge operated continuously or could be expected on a regular schedule.
How regime profit concentration enters the backtest
One state dominates opportunity
Trend, volatility expansion, crisis correlation or monetary regime can create a payoff environment absent in normal periods.
Long flat periods are averaged away
Annualized metrics compress years of stagnation into a single rate and may obscure operational carrying costs.
Regime labels are selected after the fact
A narrative can be fitted around the profitable dates unless state definitions are specified independently.
Structural change alters recurrence
Market microstructure, policy, participants and volatility can change, so one historical state may not repeat in the same form.
Compact reconstruction of regime profit concentration
| Regime bucket | Share of days | Net contribution | Profit Factor | Role |
|---|---|---|---|---|
| Crisis trend / expansion | 8% | +74R | 3.40 | Profit engine |
| Normal trend | 31% | +9R | 1.18 | Thin positive |
| Range / low volatility | 44% | −8R | 0.82 | Persistent tax |
| Transition / mixed | 17% | +5R | 1.07 | Near flat |
Removing the short crisis bucket leaves only +6R across the remaining twelve-year history. The strategy may still have value as a conditional crisis tool, but it should not be described as a continuously profitable general-purpose system.
The test that can overturn the regime profit concentration verdict
Define regimes before reading their P&L wherever possible. Then report contribution, drawdown, trade count and time under water by state and across repeated occurrences of the same state.
What trade-list analysis can and cannot identify about regime profit concentration
Export-level red flags for regime profit concentration
- More than 70% of net profit comes from less than 10% of days
- The equity curve has one large step and years of flatness
- Regime labels were invented after seeing the profit dates
- Only one occurrence of the profitable state exists
- Costs continue during long dormant periods but are omitted
What the export reveals about regime profit concentration
- Contribution by calendar, rolling window, volatility bucket and user-defined regime when data supports it
- Performance before, during and after the dominant episode
- Counterfactual results with the profitable regime removed or down-weighted
- Regime-change and rolling-robustness diagnostics that show where the edge appeared and disappeared
What regime profit concentration still requires from settings, code, or market data
- The Lab can segment historical outcomes; it does not predict the next market regime or advise when to deploy the strategy.
- Regime labels depend on definitions. A post-hoc label can explain history without possessing forward classification power.
Turn profit concentration in one market regime into a falsifiable backtest diagnosis.
Case file 15/20 · STATE-MIX · one failure mechanism, one falsifiable protocol
Research abstract: regime profit concentration
Case file 15/20 · STATE-MIX · one failure mechanism, one falsifiable protocol
This article tests one central proposition: when almost all profit comes from one brief state, the full-period average hides regime dependence and overstates repeatability. The question is not merely whether the displayed net profit or win rate was arithmetically calculated. The deeper identification problem is whether we know what constitutes one observation, what information was available at the decision time, which assumptions are necessary for the profit to exist, and how much of the conclusion survives when those assumptions are perturbed. The research object is therefore not one performance table; it is the linked data-generation, fill-generation, estimation, selection, and capital-allocation process.
The primary estimand is state-conditional expectancy and aggregate performance under a future mixture of market regimes. The observation unit is defined as a trade or time interval carrying a predeclared regime label. Without this definition, split fills, duplicated signals, common events, synthetic prices, or timestamp conversions can be double-counted as independent evidence. A larger row count does not necessarily contain more independent information. An academically defensible analysis fixes the relationship between the observation unit and the estimand before it reports sample size, standard error, or statistical confidence.
The principal sensitivity axes are state definition, transition probabilities, occupancy weights, and state-specific costs. The hidden state is occupancy of trend, range, and stress states, state transitions, and ex-post regime classification. In particular, expectancy becomes more negative in stress while the future dwell time of that state lengthens. Means and medians alone are incapable of describing that mechanism, so the analysis combines central estimates with lower quantiles, expected shortfall, sign stability, boundary-hitting frequency, and contribution concentration. The objective is not to find one pessimistic number, but to map the full region in which the original conclusion changes sign or ceases to be economically usable.
The conclusion does not attempt to prove that a backtest is good. It separates the component that remains after attempted falsification from the component that disappears when assumptions are reconstructed. The governing decision principle is to report statewise P&L, contribution share, transition matrix, and occupancy reweighting, with a cap on profit concentration in one state. This is not trading advice; it is a research procedure for measuring how much evidentiary weight a TradingView trade export can carry. Liquidity not present in the file, broker-specific rules, future regimes, outages, and gaps require separate evidence, and statistical survival never guarantees future profit.
The numerical values illustrate the method for profit concentration in one market regime; they are not a real strategy, client record, or forecast.
Hypotheses and identification target for regime profit concentration
state-conditional expectancy and aggregate performance under a future mixture of market regimes
H₀ for regime profit concentration: The reported performance is not materially dependent on the suspected failure mechanism and survives reasonable perturbations.
H₁ for regime profit concentration: The reported performance depends materially on the suspected failure mechanism and deteriorates after reconstruction, perturbation, or dependence-aware resampling.
state-conditional expectancy and aggregate performance under a future mixture of market regimes
a trade or time interval carrying a predeclared regime label
occupancy of trend, range, and stress states, state transitions, and ex-post regime classification
state definition, transition probabilities, occupancy weights, and state-specific costs
Formal estimands for regime profit concentration
Definitions precede inference.
μ_k=E[R|Z=k]Expected return conditional on regime k.P_{ij}=P(Z_t=j|Z_{t−1}=i)Regime transition probability.C_k⁺=max(Π_k,0)/Σ_jmax(Π_j,0), Σ_jmax(Π_j,0)>0Positive-profit concentration by regime, defined only when total positive contribution is greater than zero; negative contributions are reported separately.The primary estimand is state-conditional expectancy and aggregate performance under a future mixture of market regimes. The observation unit is defined as a trade or time interval carrying a predeclared regime label. Without this definition, split fills, duplicated signals, common events, synthetic prices, or timestamp conversions can be double-counted as independent evidence. A larger row count does not necessarily contain more independent information. An academically defensible analysis fixes the relationship between the observation unit and the estimand before it reports sample size, standard error, or statistical confidence.
The principal sensitivity axes are state definition, transition probabilities, occupancy weights, and state-specific costs. The hidden state is occupancy of trend, range, and stress states, state transitions, and ex-post regime classification. In particular, expectancy becomes more negative in stress while the future dwell time of that state lengthens. Means and medians alone are incapable of describing that mechanism, so the analysis combines central estimates with lower quantiles, expected shortfall, sign stability, boundary-hitting frequency, and contribution concentration. The objective is not to find one pessimistic number, but to map the full region in which the original conclusion changes sign or ceases to be economically usable.
Illustrative recomputation design for regime profit concentration
For the regime concentration reconstruction, table values are illustrative calculations used to expose a verdict reversal; they are not a user’s observed TradingView result.
| ID | Recomputation layer | Operation | Comparison | Diagnostic purpose |
|---|---|---|---|---|
| S0 | Reported result | Restate the Strategy Tester aggregate | Base | Apparent conclusion |
| S1 | Unit reconstruction | a trade or time interval carrying a predeclared regime label | Reassess count and dependence | Information correction |
| S2 | Independent recomputation | Rebuild price, size, cost, and currency row by row | Separate reconciliation error | Measurement validity |
| S3 | Local stress | state definition, transition probabilities, occupancy weights, and state-specific costs | Perturb one factor only | Causal sensitivity |
| S4 | Tail injection | expectancy becomes more negative in stress while the future dwell time of that state lengthens | Recompute lower quantiles and boundary hits | Capital preservation |
| S5 | Dependence-aware resampling | Generate paths across several block lengths | Intervals and sign stability | Estimation uncertainty |
| S6 | Selection adjustment | Log search, OOS review, and exclusions | Correct maximum-selection bias | Generalization |
| S7 | Full gate | report statewise P&L, contribution share, transition matrix, and occupancy reweighting, with a cap on profit concentration in one state | Compare with predeclared thresholds | Pass / hold / reject |
The illustrative recomputation for regime profit concentration changes one processing layer at a time, then combines only predeclared layers. S0 is never treated as ground truth; it is the statement to be audited. S1 and S2 ask whether the exported unit and arithmetic are coherent. S3 and S4 identify local sensitivity and tail failure. S5 changes the uncertainty model rather than the trade list. S6 adjusts for the search that preceded publication. S7 applies the same gate to every version. This order prevents an adverse result from being explained away by simultaneously changing several assumptions.
In the regime concentration figures, color and position encode diagnostic sensitivity only; they do not represent statistical significance or future P&L.
Diagnostic figures specific to regime profit concentration
Four separate visual tests; no decorative chart reuse.
Multi-layer audit questions for regime profit concentration
A result is only as strong as its weakest unresolved layer.
First, fix the estimand as “state-conditional expectancy and aggregate performance under a future mixture of market regimes.” Do not substitute net profit, win rate, or a visually smooth curve for that target. Declare the horizon, account currency, included frictions, and operating-stop boundary before calculation. Any post-result change creates a new hypothesis and version, preventing the question from being selected after the answer is known.
Reconstruct the observation unit as “a trade or time interval carrying a predeclared regime label” before treating rows as independent evidence. Report raw rows, parent trades, decisions, event clusters, and the denominator used for each average or standard error. Recompute statewise expectancy, positive-profit concentration, occupancy, transition matrix, and performance under alternative future regime mixtures under more than one defensible aggregation rule so that a larger export is not mistaken for a larger information set.
Preserve the hash of the TradingView export and the symbol, timeframe, session, timezone, order-processing settings, costs, account currency, and Pine version. For profit concentration in one market regime, occupancy of trend, range, and stress states, state transitions, and ex-post regime classification directly affects reproducibility. Keep immutable source, normalized, and analysis layers separate, with every join, deletion, imputation, and conversion recorded in a transformation ledger.
The export identifies only what can be rebuilt from recorded time, price, quantity, and P&L. future regime occupancy, structural change in state definitions, and crisis execution costs requires additional evidence. Mark each causal link as observed, bounded by assumption, or externally unverified. This prevents occupancy of trend, range, and stress states, state transitions, and ex-post regime classification from being presented as a confirmed fact when the available data support only an interval or conditional conclusion.
Do not adopt the platform summary as ground truth. Independently classify trades with a regime rule fixed without looking at profit, then reconstruct aggregate performance from statewise expectancy, cost, occupancy, and transition probabilities. Reconcile total and row-level differences by sign, date, symbol, and order type. If discrepancies concentrate in the exact state associated with profit concentration in one market regime, treat that concentration as a primary finding rather than dismissing it as rounding.
Report statewise expectancy, positive-profit concentration, occupancy, transition matrix, and performance under alternative future regime mixtures with intervals or resampling distributions, not point estimates alone. Match the uncertainty method to sample size, skewness, heavy tails, censoring, and selection history. If normal, quantile, and dependence-aware methods disagree on the sign, classify the edge as unidentified and show the minimum detectable effect and lower decision bound.
Do not narrow uncertainty with an IID shuffle alone. Resample time blocks that preserve regime duration and transitions using several fixed block lengths and stationary bootstrap. Preserve random seed, repetition count, wrap rule, and missing-data treatment. For each block specification, report the distribution of statewise expectancy, positive-profit concentration, occupancy, transition matrix, and performance under alternative future regime mixtures, the rejection-side tail mass, and the rate at which the verdict changes sign.
Interrogate the mechanism “occupancy of trend, range, and stress states, state transitions, and ex-post regime classification” with lower quantiles, expected shortfall, influence, cluster length, and boundary-hitting measures. Historical maximum loss is not a loss cap. Define several absorbing or operating boundaries—capital, margin, mandate drawdown, and recovery time—and record which boundary fails first under each stress.
A flat commission deduction is not an execution model for profit concentration in one market regime. Allocate spread, slippage, financing, borrow, roll, conversion, rounding, and rejected orders to the relevant unit. Recompute statewise expectancy, positive-profit concentration, occupancy, transition matrix, and performance under alternative future regime mixtures under base, upper-quantile, and crisis states while preserving the possibility that costs and losses worsen together.
Count the complete population of periods, symbols, timeframes, parameters, exits, filters, and metrics that were tried. Do not detach the attractive result for profit concentration in one market regime from rejected candidates, interim changes, or repeated validation reviews. Where appropriate, use PBO, SPA, and a Deflated Sharpe Ratio, and treat an unrecorded trial count as a material audit limitation.
Test whether profit concentration in one market regime is concentrated in one trend, volatility, liquidity, rate, or session state. Define regimes prospectively or on training data only. Report statewise statewise expectancy, positive-profit concentration, occupancy, transition matrix, and performance under alternative future regime mixtures, occupancy, transition probabilities, and costs, then reweight the mixture to adverse but realistic future compositions.
For the regime profit concentration case, the same trade set can follow different capital paths under another inception date, order, initial balance, rounding rule, or stop condition. Separate fixed quantity, fixed R, and percentage sizing, then use circular shifts and block orderings to recompute drawdown, recovery, and boundary hits. Equal terminal P&L does not imply equal path risk.
Perturb “state definition, transition probabilities, occupancy weights, and state-specific costs” one axis at a time before creating a joint sensitivity surface. Add the negative control “freeze regime labels outside the training period and compare with any ex-post profitable classification.” Predefine the grid and crisis rule so that neither the most favorable nor the most damaging cell is selected after inspection. Save the slope, curvature, and exact point where the decision boundary is crossed.
Have a second implementation classify trades with a regime rule fixed without looking at profit, then reconstruct aggregate performance from statewise expectancy, cost, occupancy, and transition probabilities, then compare critical row-level outputs. Regression fixtures should include empty files, duplicate timestamps, extreme costs, reverse ordering, missing values, and boundary cases. Agreement between implementations is insufficient if they share the same bad input, so separate data construction and review roles where feasible.
Predeclare the decision rule. This case passes only if “no major regime carries an unacceptable loss and aggregate expectancy clears the threshold under adverse but realistic regime mixtures.” Near a boundary, disclose interval width and economic materiality rather than a binary badge. If only one favorable block length, cost state, or implementation passes, classify the result as assumption-sensitive rather than robust.
The evidence ledger must store the input hash, code version, settings, exclusions, “state definition, transition probabilities, occupancy weights, and state-specific costs,” block lengths, random seed, repetition count, and every scenario output. Keep exploratory and confirmatory results in separate namespaces and retain failed trials. When new TradingView data arrive, create a new version and track statewise expectancy, profit contribution, occupancy, transition probability, and classification confidence rather than overwriting the old result.
Translate statistical changes into capital consequences. A shift in expectancy, lower quantile, recovery time, or boundary risk caused by profit concentration in one market regime should be mapped to trade count, capital, margin, and continuation. A small per-trade difference can compound under high turnover, while a rare loss can be decisive near an absorbing boundary.
Separate hypothesis design, implementation, independent recalculation, and approval where practical. Stop automatically on material reconciliation error, unresolved missing data, non-reproducibility, or a predeclared threshold breach. Audit the chain “one prolonged regime → concentrated profit → dilution in the full-sample average → illusion of universality → loss after transition,” and monitor statewise expectancy, profit contribution, occupancy, transition probability, and classification confidence prospectively without turning a historical pass into a promise of future profit.
Falsification protocol for regime profit concentration
report statewise P&L, contribution share, transition matrix, and occupancy reweighting, with a cap on profit concentration in one state
Freeze the TradingView source for the regime profit concentration audit
Store the export without alteration and record its hash, export time, strategy, symbol, timeframe, and settings. Preserve every column relevant to profit concentration in one market regime; deletions and imputations belong only in derived tables.
Reconstruct the observation unit for regime profit concentration
Aggregate rows into “a trade or time interval carrying a predeclared regime label,” and report raw rows, parent trades, events, and independent clusters. Recompute the critical result under another defensible aggregation.
Independently recompute the displayed regime profit concentration result
Independently classify trades with a regime rule fixed without looking at profit, then reconstruct aggregate performance from statewise expectancy, cost, occupancy, and transition probabilities. Reconcile row-level and aggregate outputs with Strategy Tester and preserve where discrepancies concentrate.
Isolate the regime profit concentration mechanism
Treat profit concentration in one market regime as the principal mechanism and move “state definition, transition probabilities, occupancy weights, and state-specific costs” one axis at a time while holding other settings fixed.
Map the operating boundary for regime profit concentration
Combine the primary and interacting axes on a predeclared grid and recompute statewise expectancy, positive-profit concentration, occupancy, transition matrix, and performance under alternative future regime mixtures. Record the width and connectivity of the acceptable region and every boundary crossing.
Resample the dependence structure relevant to regime profit concentration
Use time blocks that preserve regime duration and transitions with several fixed block lengths and stationary bootstrap. Save every random seed, repetition count, and block specification.
Inspect influence points and operating boundaries for regime profit concentration
For the regime concentration influence test, remove the largest contributor, top-k contributors, selected periods, and relevant regimes in sequence; then recompute lower-tail measures and the operating boundary.
Apply negative controls and conservative bounds to regime profit concentration
Freeze regime labels outside the training period and compare with any ex-post profitable classification. Bound future regime occupancy, structural change in state definitions, and crisis execution costs as unobserved factors rather than elevating the optimistic value into the final answer.
Apply the predeclared gate to regime profit concentration
Do not move the threshold after seeing results. Compare with “no major regime carries an unacceptable loss and aggregate expectancy clears the threshold under adverse but realistic regime mixtures,” and distinguish pass, hold, and reject. Any unresolved material mismatch causes a hold.
Save a reproducible evidence package for regime profit concentration
Bundle the source, transformation ledger, formulas, figures, all scenarios, failure logs, and code version for rerun in another environment. Prospectively monitor statewise expectancy, profit contribution, occupancy, transition probability, and classification confidence.
Decision gate for regime profit concentration
Reject the story before trusting the curve.
How to read the regime profit concentration figures and equations
The figures for regime profit concentration use illustrative recomputations constructed to expose this specific failure mode. Do not infer statistical significance from line position or color alone; first verify the estimand, units, denominator, censoring rule, and cost sign defined by the equations. A sensitivity surface is not a causal estimate. It shows how a conclusion changes only within the stated assumptions. Resampling should compare an IID shuffle with stationary and block bootstrap procedures across several block lengths so that loss clustering and regime persistence are not silently destroyed. Store the random seed, iteration count, block length, bandwidth, and missing-data treatment, and claim reproducibility only after an independent implementation reproduces the same aggregates.
This case passes only if “no major regime carries an unacceptable loss and aggregate expectancy clears the threshold under adverse but realistic regime mixtures” across reconstructed values, local perturbations, joint sensitivity, dependence-preserving resampling, and the negative control, with no material sign reversal or unresolved reconciliation error. A pass is limited evidence against the stated failure mode, not certification of future profit.
- The estimand and observation unit were fixed before outcomes were reviewed
- For regime concentration, any material disagreement between reported and independently recomputed values must be resolved or explicitly explained.
- The regime concentration claim passes this gate only when its acceptable stress region is broad and connected rather than one isolated favorable island.
- The sign of the regime concentration estimate must remain stable across defensible block lengths, saved seeds, and reasonable interval methods.
- For regime profit concentration, economic margin remains after deleting the largest and top-five contributors and key regimes
- For regime profit concentration, conservative cost, fill, and capital-boundary scenarios remain inside the stopping mandate
Limitations, external validity, and reproducibility of the regime profit concentration audit
Every inference has a boundary.
The first limitation is that a trade export does not contain the complete market state. If order-book depth, queue position, network latency, rejected orders, broker liquidity, or realized financing history is absent, state-conditional expectancy and aggregate performance under a future mixture of market regimes remains model-mediated. Model outputs should be displayed as scenario ranges and must not be formatted as though they were directly observed facts.
A second limitation specific to the regime profit concentration analysis is structural change. A long historical sample does not guarantee a common population when market rules, participants, volatility, rates, spreads, data construction, or Pine execution semantics change. Do not increase nominal sample size by indiscriminately pooling old periods. Estimate rolling and regime-conditioned behavior and test parameter stability around detected changes.
A third limitation specific to the regime profit concentration analysis is reuse of the diagnostic battery. Applying these tests repeatedly to the same data and editing the strategy until it passes turns the diagnostic process itself into another optimizer. Every post-test edit starts a new model version and requires untouched or prospective evidence. A test chosen after reading the outcome belongs to exploration and cannot be counted as independent confirmation.
A fourth limitation for the regime profit concentration analysis is the distinction between statistical survival and operational suitability. Behavioral tolerance, locked capital, tax, regulation, outages, account terms, order-size limits, market-order restrictions, and liquidity discontinuities cannot be resolved from a CSV alone. The lab is a diagnostic for discovering hidden failure risk earlier; it is not investment advice, a performance warranty, or a guarantee of bounded loss. User-specific constraints remain a separate decision layer.
The estimand “state-conditional expectancy and aggregate performance under a future mixture of market regimes” is identified only within the columns present in the TradingView export and the stated assumptions. If future regime occupancy, structural change in state definitions, and crisis execution costs cannot be observed, report bounds rather than a false point estimate.
Past estimates of profit concentration in one market regime need not belong to the same population after changes in rules, participants, volatility, costs, or data specifications. Track statewise expectancy, profit contribution, occupancy, transition probability, and classification confidence in rolling and regime-specific windows.
For regime concentration, repeatedly applying the same diagnostic battery and editing until it passes turns verification into another optimizer. Every post-audit change therefore creates a new model version and requires untouched evidence.
Even if no major regime carries an unacceptable loss and aggregate expectancy clears the threshold under adverse but realistic regime mixtures, the analysis does not establish tax, regulatory, behavioral, liquidity, order-size, or systems suitability. Separate statistical diagnosis from live-operating approval.
Deleting observations related to occupancy of trend, range, and stress states, state transitions, and ex-post regime classification may improve the result. Compare no deletion, conservative imputation, and worst-case imputation, and display how statewise expectancy, positive-profit concentration, occupancy, transition matrix, and performance under alternative future regime mixtures changes.
Run the control “freeze regime labels outside the training period and compare with any ex-post profitable classification.” If the control performs similarly, suspect processing rules or common market drift before attributing performance to the strategy.
After a provisional pass, log statewise expectancy, profit contribution, occupancy, transition probability, and classification confidence sequentially and stop on persistent departures from the predeclared predictive range. Diagnose implementation drift before reoptimizing history.
Multiple methods can agree because they share the same bad input or the same mechanism “occupancy of trend, range, and stress states, state transitions, and ex-post regime classification.” Give lower-tail outcomes, failed scenarios, and unresolved mismatches the same visual prominence as favorable results; test count is not proof of correctness.
Independent and adversarial findings for regime profit concentration
The regime concentration case has a separate review line for formulas, chart encodings, data definitions, and falsifiability so agreement on one layer cannot mask failure on another.
The formula audit checks numerator, denominator, sign, unit, domain, and every conditioning assumption as one system. The material caution for this case is: Regime concentration C_k⁺ is defined only when total positive contribution exceeds zero. Negative regime contributions are displayed separately rather than netted away. Regime labels must not be created after observing profit, and classification and transition uncertainty belong in sensitivity analysis. A correct symbolic expression can still calculate the wrong quantity when a column, currency, time unit, or fee sign is misdefined, so those mappings are part of the mathematical audit.
The figure audit assigns distinct jobs: Figure 1 diagnoses profit concentration in one market regime; Figure 2 maps joint sensitivity; Figure 3 shows the dependence-preserving distribution of aggregate expectancy under alternative regime mixtures; Figure 4 traces causal propagation. Color denotes distance to a predeclared gate, not probability or observed performance. Axis units, zero, quantiles, censoring, and bounds must agree with captions and tables. A smooth SVG line is explanatory geometry, not evidence of estimation precision.
The adversarial test does not cherry-pick one hostile scenario. It uses the negative control “freeze regime labels outside the training period and compare with any ex-post profitable classification,” resamples time blocks that preserve regime duration and transitions at several block lengths, and bounds future regime occupancy, structural change in state definitions, and crisis execution costs as unobserved factors. Repetitions, seeds, exclusions, block specifications, and plotting range are frozen before results so the implementer cannot tune the audit after seeing the answer.
The independent conclusion is restricted to whether “no major regime carries an unacceptable loss and aggregate expectancy clears the threshold under adverse but realistic regime mixtures.” It does not certify a good strategy or future profit. Any material reconciliation error, formula-domain violation, table-figure contradiction, sign reversal across defensible block lengths, or failure to outperform the negative control produces hold or reject. Prospectively, monitor statewise expectancy, profit contribution, occupancy, transition probability, and classification confidence.
Methodological references for regime profit concentration
Primary methods and official platform documentation.
- Hamilton, J. D. (1989). A New Approach to the Economic Analysis of Nonstationary Time Series and the Business Cycle. Econometrica.
- Newey, W. K. & West, K. D. (1987). A Simple, Positive Semi-definite, Heteroskedasticity and Autocorrelation Consistent Covariance Matrix. Econometrica.
- Politis, D. N. & Romano, J. P. (1994). The Stationary Bootstrap. JASA.
- Efron, B. (1979). Bootstrap Methods: Another Look at the Jackknife. Annals of Statistics.
- Lo, A. W. (2002). The Statistics of Sharpe Ratios. Financial Analysts Journal.
- White, H. (2000). A Reality Check for Data Snooping. Econometrica.
- TradingView Pine Script® documentation: Strategies.
References for the regime profit concentration case provide methodological context; they do not validate the synthetic numbers in this article or certify any backtest result. TradingView documentation is used for platform semantics, while statistical papers motivate uncertainty and selection controls.
Frequently asked questions about regime profit concentration
Is profit concentration always bad?
No. Tail-risk and trend strategies may intentionally wait for rare states. The concentration must be transparent, financially survivable and supported by more than one relevant episode where possible.
How should regimes be defined?
Use rules available at the time—volatility, trend, liquidity or macro variables—with thresholds chosen before evaluating the target P&L.
Can rolling performance replace regime labels?
It is a useful neutral view of change through time, but it still needs interpretation and does not identify causal market states by itself.
Can a backtest exposed to regime profit concentration be trusted?
Do not judge the regime concentration case from a finished equity curve alone. Use the TradingView trade list to inspect the mechanism-specific concentration, path, cost, timing, and dependence evidence shown on this page.
Important limitations for the regime profit concentration analysis
This article provides educational, descriptive analysis of constructed backtest failure examples. It is not investment advice, a buy or sell signal, a forecast or a promise of performance. Backtest results depend on data, code, broker-emulator assumptions, costs, sizing and market structure. TradingView is a trademark of TradingView, Inc.; SG Group is independent and does not claim endorsement or sponsorship by TradingView.
Counterpart: 利益のほぼ全てが一つの相場局面から生まれていた

