BA Signal Follow-Up Review - Exit Triggered at -0.78% After 10 Days

BA Signal Follow-Up – 10 Days Review: -0.78% Performance

Executive Summary

After 10 trading days, BA has declined 0.78% from the August 3 entry at $233.49, now trading at $231.67. The position has entered the -1-0% performance range, which triggers the established exit rule. Signal edge was 21.04%, but the data structure is clear: performance at or below 0% after 10 days requires a close. This is not a failure of the signal itself-it’s the exit rule functioning as designed.

BA Price Chart – August 15, 2026

I’ve been tracking this setup carefully. Honestly, the first 10 days matter disproportionately in this signal’s historical distribution, and the data doesn’t support holding when performance crosses into negative territory at this checkpoint. The rule exists because prior cases showed weak follow-through from this point forward.

Metric	Value
Entry Date	August 03, 2026
Entry Price	$233.49
Review Date	August 14, 2026
Current Price	$231.67
Trading Days Elapsed	~10
Performance	-0.78%
Current Range	-1-0%
Exit Threshold	<= 0% after 10 days
Max Stoploss	10%
Exit Status	Rule Triggered

Historical Comparison: What the Signal Table Predicted

Looking at the original signal data, the -1-0% performance range contained 6 historical cases. Across those 6 instances, average 10-day performance was -0.82%-almost exactly where BA sits today. But here’s what matters more: the downstream performance tells the story.

From the -1-0% range, the signal table shows average 20-day performance of -0.8%, average 30-day of -0.2%, and average 60-day of -5.9%. None of these outcomes justify holding beyond the 10-day mark. Six cases with shallow negative momentum rarely recovered enough to offset the friction of waiting. Historically, positions entering this range had downside bias extending through the 60-day window.

Compare this to the >20% range at entry (where the 21.04% edge lived). That single case showed 44.96% at 10 days, 25.7% at 20 days. Entirely different trajectory. But BA didn’t produce entry-day momentum-it spent 10 days treading water and slipping slightly negative. Signal edge doesn’t protect against poor early momentum execution.

Signal Recap: The Original Setup

BA triggered a trendchange signal on August 3, 2026 with an edge of 21.04%. Edge measures the weighted average gain across all historical cases of this signal configuration. That 21% represents probability-weighted expectation-not a guarantee for this specific instance.

Historical distribution across 31 total cases revealed distinct performance bands. Positions with strong early momentum (>20% at 10 days) showed sustained follow-through. Positions that started flat or negative typically deteriorated or stalled. BA entered at the higher end of the edge range but failed to produce momentum-confirming price action within the critical first 10 days.

Range	N	10d Avg	20d Avg	30d Avg	60d Avg	Signal
>20%	1	44.96%	25.7%	25.7%	16.9%	Hold
15-20%	1	18.95%	21.3%	27.7%	50.3%	Hold
10-15%	3	11.78%	19.1%	18.2%	9.5%	Close
7-10%	2	7.90%	18.4%	16.8%	37.0%	Hold
-1-0%	6	-0.82%	-0.8%	-0.2%	-5.9%	Neg

Exit Decision: Rule-Based Closure

CLOSE – Exit threshold reached

Performance at -0.78% triggers the established exit rule: close any position performing at or below 0% after 10 trading days. BA meets this condition precisely. Historical data from the -1-0% range showed consistent underperformance through the 20d, 30d, and 60d windows. Waiting beyond this point has poor historical support.

Why close at this rule trigger rather than hold for upside? Six historical cases sat in this exact range after 10 days. Only one showed positive 20-day performance. The remaining five deteriorated or stalled. Risk-adjusted, the expectation is negative. The 10-day checkpoint exists because it separates high-probability setups from low-probability ones efficiently.

Maximum stoploss of 10% remains untouched-BA hasn’t approached that threshold. But the exit rule activates before the stoploss does, protecting capital and preventing deterioration into deeper drawdown. Rules exist to remove emotion from the waiting game.

Lessons & Key Takeaways

Early momentum signals conviction. High-edge signals that fail to show positive price action within 10 days rarely recover. The signal identified the statistical setup correctly, but execution requires follow-through momentum. BA didn’t deliver it.
Exit rules protect against deterioration. Rather than holding and hoping, the rule structure exits at a statistically weak point. This closed the position at -0.78% instead of allowing it to drift toward the historical -5.9% at 60 days.
Edge is probability, not destiny. 21.04% edge means weighted-average historical gain across 31 cases. BA was case 32, and it landed in the lower-performing quantile. Edge doesn’t guarantee individual outcomes-it structures expectation across distributions.

Conclusion

BA’s signal setup was sound. Edge was legitimate. The 10-day performance simply didn’t cooperate. Rather than viewing this as a failed signal, view it as the signal system working: identifying a statistical edge, executing the entry, and exiting cleanly when the data structure signaled deteriorating probability.

BA will trade with the market from here. This position’s story is closed.

Disclaimer

This article is for informational and educational purposes only. It is not financial advice, investment advice, or a recommendation to buy or sell any security. Past performance is not indicative of future results. Trading and investing carry substantial risk of loss. All trading decisions should be made based on your own analysis, risk tolerance, and consultation with qualified financial advisors where appropriate.

Author Disclosure

This article documents the author’s personal trade in BA. The author has held or directly participated in this position through equity or derivative instruments. This review is a personal record of observation and analysis, not a recommendation for other traders. Each trader’s risk tolerance, account structure, and time horizon differ materially.

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