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What is RSI oversold? — chart signal explained

RSI compares how strongly price has risen versus fallen over the last 14 candles and boils it down to a single number between 0 and 100. Big gains push it toward 100, big losses toward 0. Think of it as a thermometer for how one-sided recent selling or buying has been.

When does it fire? — BaroBara criteria

On barobara, this signal lights up when the 14-candle RSI drops below 30.

How traders usually read it

Many traders treat readings under 30 as a zone where too much selling happened too fast. The hope is that sellers are running out of steam and price might bounce back, which is why this is a go-to signal for people hunting for rebound spots.

What to watch out for

In a strong downtrend, RSI can sit in oversold territory for a long time while price keeps falling. Below 30 doesn't mean a bounce is coming — it only means a lot of selling already happened. Check the historical stats to see how often it actually worked out.

What the data actually shows (BTC 4h)

The common reading is a bounce (up) — but what actually happened matters more. This signal has fired 295 times on BTC 4h; across the most recent 295, price reached the small target (+0.25%) first about 43% of the time. Widen the target to ±1% and it becomes about 49%. A historical probability, not a guaranteed direction — and it shifts with market regime.

Odds and expected value — with symmetric target and stop (±)

Exactly the barobara framing: which side got hit first, +X% or −X%. Target and stop are set to the same %, and the win rate is how often the upside (+X%) was reached first.

Target = stop (±)Win rate (+ first)EV (before fees)
±0.25%43%-0.04%
±0.5%47%-0.03%
±0.75%48%-0.03%
±1%49%-0.02%
±1.5%48%-0.06%
±2%51%+0.04%
📐 How to read this. EV assumes a symmetric ±X% target and stop: EV = target × (win rate − loss rate), so any win rate above 50% gives a positive EV. Fees are NOT included — they differ by exchange and order type (maker/taker). In reality fees come off the top, and the smaller the target, the bigger the bite fees take (at ±0.25%, even modest fees eat much of the edge). Timeouts (neither side hit within the horizon) are classified by the closing side, and an asymmetric target/stop changes all of these numbers — setting-dependent references, not absolutes.

Broken down by market regime

⚠️ This table uses a different basis than the symmetric (±) table above — a small +0.25% target with a wide −3.0% stop (fees included). The small target makes the win rate look high while EV is often negative — exactly what signal groups hide. And the same signal behaves differently across regimes.

RegimeWin rate (+0.25% target)EV (−3.0% stop)Sample
Bear market77%-0.57%N=136
Sideways85%-0.30%N=107
Bull market83%-0.36%N=46

Recent occurrences

How far price actually moved the last few times this signal fired (MFE = maximum favorable excursion).

DateMFEResult
2026-01-310.0%— 🔴 stopped
2026-02-032.72%✅ hit 🔴 stopped
2026-02-040.15%— 🔴 stopped
2026-02-232.57%✅ hit 🔴 stopped
2026-02-2410.75%✅ hit
2026-03-270.88%✅ hit
2026-05-234.08%✅ hit
2026-05-281.71%✅ hit
🦫 See whether this signal is live right now — and verified odds for other signals and combos — on win-rate picks. Cut trading costs with fee cashback.
Data: full history since 2017 · 19448 bars · ~2.7/month · win rate from the most recent 295 occurrences. For reference, not a prediction. A signal is a historical probability, not a guaranteed direction.
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