Sindex AIWhat is the RSI Oversold?
The Relative Strength Index compares the size of recent gains to recent losses and expresses the result on a 0 to 100 scale. Readings below 30 are conventionally called oversold, and below 20 deeply oversold. The RSI Oversold strategy does not buy simply because the reading is low; it waits for the RSI to turn and climb back above 20, which shows that selling pressure is easing and buyers are beginning to reassert themselves.
Crypto traders favour this setup because sharp sell-offs are common and often overshoot. Liquidation cascades push RSI to extreme lows in minutes, and the subsequent relief bounce can be fast. Waiting for the recovery cross rather than the low itself avoids buying while the knife is still falling.
How the RSI Oversold works
Sindex calculates a 14-period RSI on closing prices and compares the last two values. The signal fires on the bar where RSI closes at or above 20 after the previous bar closed below 20. That is a strict crossover: a symbol that is still sitting at 15 will not appear, and neither will one that bottomed at 25 and never reached the deep zone.
The score starts at 50 and grows with how deeply oversold the RSI was on the two bars before the cross, measured as the distance below 30. A recovery from an RSI of 12 ranks higher than a recovery from 19, on the reasoning that more extreme readings tend to produce stronger snapbacks.
Because only 20 candles are needed, the strategy works on every scanner timeframe from 15m to 1d. Note that a 20 threshold is stricter than the textbook 30; the scanner is deliberately hunting for washed-out conditions, so the number of matches is small in normal markets and expands sharply during panics.
Rules
Entry rules
- Wait for the candle on which RSI closes back above 20; do not front-run it while RSI is still falling.
- Prefer setups where price has also formed a reversal candle, such as a hammer or an engulfing bar, at the low.
- Check that the low occurred near a support level or a prior demand zone rather than in open air.
- Enter at the close of the signal bar or on a small retest of the low that holds.
- Scale in rather than taking full size at once, since deep oversold readings can persist in a crash.
Exit rules
- Stop below the lowest low of the sell-off that produced the oversold reading.
- First target at RSI 50 or at the nearest resistance, whichever comes first; second target at the pre-sell-off price area.
- Setup fails if RSI drops back below 20 and price closes under the swing low.
- If the bounce stalls and RSI cannot clear 40 within a reasonable number of bars, reduce the position.
Best conditions
- In an overall uptrend on the higher timeframe, where the oversold reading is a pullback rather than a trend change.
- After a liquidation-driven wick that quickly recovers, showing forced selling rather than a fundamental shift.
- When bullish divergence is present: price makes a lower low while RSI makes a higher low.
- On 1h to 4h charts where oversold bounces have room to develop without excessive noise.
Pitfalls
- In a strong downtrend RSI can stay below 20 for many bars and each small cross above it fails.
- A crossover on a low timeframe can be a single relief candle before the decline resumes.
- Buying oversold readings on illiquid altcoins is risky; thin books can keep dropping with no bounce at all.
- Risk reminder: counter-trend longs with high leverage are a classic way to blow up a futures account; keep size small.
RSI Oversold FAQ
- Why does Sindex use RSI 20 instead of 30 for oversold?
- The scanner targets extreme washouts rather than routine dips. Requiring RSI to drop below 20 and then recover produces fewer but more selective signals than the traditional 30 level.
- Is an oversold RSI a buy signal on its own?
- No. Oversold means momentum has been strongly negative, which can continue. The strategy only triggers on the recovery cross, and even then it is best combined with support and a reversal candle.
- Which RSI period does the scanner use?
- The standard 14-period RSI on closing prices, matching what most charting platforms show by default.
- Can I combine RSI Oversold with other Sindex strategies?
- Yes. Many traders pair it with the Support Level scan or a Stochastic Oversold reading, and Algo Forge lets you combine these conditions into one backtestable rule set.