After 3 Red Days in a Row, What Happens Next?

Three red days in a row. Your ticker is down and the panic is building. Everyone has an opinion: "it's oversold, buy the dip" or "the trend is your friend, stay short." But what does the data actually say?

The Streak Analyzer's Post-Streak Analysis answers this question by looking at every historical instance of a consecutive streak and measuring what happened next.

Three Cards, One Answer

The Post-Streak Analysis displays three cards side by side. The first shows what happened after N consecutive green days. The third shows what happened after N consecutive red days. And the middle card is the baseline: what happens on any given day, with no streak filter at all.

Each card breaks the forward returns into two time horizons. Next Day shows the close-to-close return on the very next trading day after the streak ends. Next 5 Days shows the cumulative return five trading days out. For the baseline card, these are labeled Daily Move and Any 5 Days since there's no streak condition.

For each time horizon, you see four stats: the average return, the median return, and the percentage of times the next move was green vs. red. This gives you a complete picture of the distribution, not just a single number.

The Baseline Is the Key

The most important card is the one in the middle. The baseline shows what the ticker does on a normal day with no streak filter. If the "After 3 Red Days" card shows an average next-day return of +0.45%, but the baseline daily move is already +0.40%, then the streak isn't telling you much. The edge is only 5 basis points.

But if the baseline daily move is +0.10% and the post-red-streak return is +0.55%, now you have something. The streak condition is producing a meaningfully different outcome than random. That's the kind of signal worth paying attention to.

Always compare the green and red cards against the baseline. Without this comparison, you can't tell whether a streak actually predicts anything or whether it's just noise.

How to Read the Cards

Start with the baseline card. Note the average daily move and the green percentage. This is your reference point. Then look at the green streak card and the red streak card. Ask yourself: is the average return meaningfully different from baseline? Is the green/red split materially shifted?

If the baseline green percentage is 53% and the post-red-streak green percentage is 54%, there's no edge. But if it jumps to 62%, that's a statistically interesting difference, especially if backed by a reasonable sample size.

Pay attention to the sample count shown on each card. A post-streak average based on 8 occurrences is far less reliable than one based on 80. The Streak Analyzer will show "Too few samples" if there are fewer than 3 data points, but even 10-20 samples should be treated with caution.

Finally, compare the 1-day and 5-day horizons. A ticker might show a strong next-day bounce after red streaks but a flat 5-day return, suggesting the bounce is short-lived and mean-reverts quickly. Or the opposite: a weak day 1 but a strong 5-day move, suggesting the real opportunity is in holding through the noise.