Analyzing historical drops: is it actually reliable?

Hi everyone, I’m a software engineer with a passion for finance and statistics, and I’m currently working on a small personal project. I’d like to get some feedback from the community to understand how valuable this approach could be in real trading/investing. In short: I’m analyzing all the significant single‑day drops of a stock (e.g., -6%, -7%, -10%) and measuring how the price behaved in the following days and months. The goal is to understand whether there are recurring patterns that could help evaluate an entry after a sharp decline. # What I’m analyzing exactly For each historical drop, I calculate: * Subsequent rebounds (1, 2, 5, 10, 20, 60, 90, 120, 180, 300 days) * Probability of a rebound for each time horizon * Recovery time (how many days it takes to return to the pre‑drop price) * **VolumeShock** → how abnormal the day’s volume is compared to the average * **CyclePos** → where the price sits within the yearly cycle (near the lows or near the highs?) * **DropQualityScore** → a 0–100 score summarizing drop quality (intensity + volume + context) The basic idea behind this is simple: **not all drops are the same.** * A -8% drop with low volume is just noise. * A -8% drop with 5× average volume is panic. * A -8% drop near yearly highs is often an overreaction. * A -8% drop near yearly lows is riskier but can produce strong rebounds. I’m trying to understand whether these historical patterns can help: * identify “high‑quality” drops * estimate rebound probabilities I started from a real case: the recent FinecoBank drop (-9%). I analyzed the stock’s historical data over the last 10 years. https://preview.redd.it/g8ndngjpfwjg1.png?width=1218&format=png&auto=webp&s=6c05e2b6a8a1d169aac18ee02196e8e8ec69799c Then I extracted only the days where the stock fell more than 6% during the period. From there, case by case, I analyzed what would have happened if we had opened a position at the end of the drop day (during the maximum intraday decline): https://preview.redd.it/gcwuqj4sfwjg1.png?width=2732&format=png&auto=webp&s=598f1a2e44e9bb6cfa77ba8d20861a86fea46009 # What do you think? Does it make sense to use this kind of historical analysis to evaluate entries on sharp drops? Has anyone here tried something similar? Are rebound patterns after large drops stable enough to be exploited? Any metrics you would add? I’m really curious to hear opinions, criticism, ideas, or suggestions.