SPECIMEN 003 / STRATEGY AUTOPSYCRYPTO · OUT-OF-SAMPLE TESTED
RSI Oversold Bounce
Buy when it's oversold, sell when it's overbought. The first strategy everyone tries. On crypto it gets taken apart.
Mean reversion
Spot · daily · RSI(14)
10 coins · out-of-sample
Failed out-of-sample
The claimBuy the dip, sell the rip — free money in a range.
The realityBeat holding on only 2 of 10 coins, and mostly lost money doing it. Worse than nothing.
Cause of death Bought the knife
01 The seduction
RSI under 30 is “oversold,” over 70 is “overbought” — so you buy the dip and sell the rip. It's the first indicator in every tutorial, and on a chart that's chopping sideways it genuinely looks like free money. High win rate, too, which is exactly what makes it so easy to believe.
RSI Oversold Bounce · BTC
+71%
$1,000 → $1,706 vs $7,766 holding
Beat buy & hold
2 / 10
almost never
Out-of-sample
4 / 10
faded out-of-sample
Simulated on real historical prices, fees included, and past results are not the future. See how we grade →
02 The one line that ends it
Failed
RSI Oversold Bounce vs. doing nothinglog scale
The strategyBuy & hold (doing nothing)
RSI Oversold Bounce beat holding on 2 of 10 majors — and 4 of 10 out-of-sample. Same money, same window, fees included — measured against simply buying Bitcoin once and never touching it.
03 The evidence
| Coin | Trades | Win % | Strategy | Buy & hold | Verdict |
|---|
| BTC | 11 | 73 | +71% | +677% | lost |
| ETH | 9 | 78 | +20% | +1236% | lost |
| BNB | 8 | 50 | +51% | +2761% | lost |
| SOL | 7 | 43 | −85% | +2766% | lost |
| XRP | 11 | 73 | +230% | +365% | lost |
| LINK | 9 | 67 | +322% | +140% | beat |
| LTC | 9 | 67 | +118% | −36% | beat |
| DOGE | 12 | 67 | +97% | +2138% | lost |
| ADA | 12 | 75 | −18% | +173% | lost |
| AVAX | 7 | 29 | −86% | +60% | lost |
Beat holding on 2 of 10 coins — and on 4 of 10 in the recent out-of-sample period (the honest test that separates a real edge from a bull-market coincidence).
04 The other direction — what if you also shorted?
The headline test sits in cash when it is not long. The fair question is whether trading both ways helps — so we ran the identical rule with the flat side flipped to a 1x short (still no leverage), same fees, same ten coins.
| View | BTC $1k→ | Median return | Median maxDD | Beat hold | Verdict |
|---|
| Long / flat · headline | $1,706 | +71% | 66% | 2/10 | Failed out-of-sample |
| Long / short 1x · illustrative | $87 | −91% | 100% | 0/10 | Failed out-of-sample |
Trading it both ways was worse on the headline test — median return +61% → −100%, worst drawdown 66% → 100%. And that is before funding: a short is not spot, it needs a derivative that pays borrow/funding (~10–30%/yr) this omits — add a realistic 20%/yr and the median return drops to −100%. Shorting a market that mostly went up is a wrecking ball, not a rescue.
Why the short side is illustrative
You cannot short on spot — it needs a derivative (a perpetual or margin), which is why the headline test is long/flat. These short figures are shown at 1x with no funding or borrow cost, so the real-world version is worse than what you see here, not better. The window is also net-bullish; the short side only pays in a sustained bear, and betting on that is a different strategy entirely.
05 Verdict
It won two thirds of its trades and still got crushed. That's the whole lesson: win rate isn't profit. On an asset that trends, “buy oversold” just means catch the knife, over and over, while the thing you sold keeps running without you.
Method — the headline test is long/flat spot, no leverage (the long/short view above is a 1x illustration, funding excluded) · a signal read at the daily close is filled at the NEXT close (a full bar of lag — no look-ahead) · 0.06% fee each side, buy-and-hold charged one entry fee too · each coin over its available Binance daily history with warm-up · out-of-sample = held-back most-recent ~45% of each coin's data (a recency holdout, not rolling walk-forward). Honest limits: the ten coins are today's majors (survivorship bias) and are correlated, so “beat on N of 10” is not N independent tests. Reproducible.
The honest other side
Look at the win rate before you write it off — around two thirds. That's the trap, not the edge. You win small and often, then one “oversold” coin keeps bleeding and you hold it all the way down. A high hit-rate that still loses to holding is the most seductive way to lose money there is.
06 Your turn
That was the textbook version.
We tested it exactly as it's usually described. Yours is probably a little different — a tweak to the settings, an added filter, a different exit. You don't need to code any of it: just describe your version to Vera, our assistant, in plain English, and she builds it and runs it through this same honest test. Most don't survive. A few do — we've proven that. Worth knowing which yours is.
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