RSI (Relative Strength Index) is one of the most widely used momentum indicators — and one of the most widely misused, mostly because "overbought" and "oversold" get treated as automatic reversal signals when they aren't.
Part 1. What RSI Actually Measures
RSI compares the magnitude of recent gains to recent losses over a set period (14 periods is standard) and expresses it as a number between 0 and 100. It's a momentum measure, not a price-target or reversal predictor on its own.
Part 2. Reading the Levels
- Above 70: conventionally considered "overbought" — momentum has been strongly positive recently.
- Below 30: conventionally considered "oversold" — momentum has been strongly negative recently.
- Around 50: neutral momentum, often used as a trend-confirmation midline in some strategies.
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Treating "overbought" as "must reverse now" is the single most common RSI misuse. In a strong trend, RSI can stay above 70 (or below 30) for extended periods while price keeps moving in the same direction — trading against that is a common way to lose money fighting a trend that RSI alone didn't predict would end.
Part 4. Weight RSI as One Input, Not the Whole Decision
Here's how to use RSI without over-relying on it:
- Note the RSI reading, but log it alongside market structure and volume context rather than acting on it alone.
- Let the Void Engine weigh RSI as one of 12+ variables in its 0-100 setup score, rather than treating it as a standalone trigger.
- Journal outcomes tagged by "RSI divergence" vs. "raw overbought/oversold" to see which version actually works for you.
Part 5. Better Ways to Use RSI
- Divergence: price making a new high/low while RSI fails to confirm it can signal weakening momentum — generally considered more reliable than the raw overbought/oversold level alone.
- Combined with trend context: RSI oversold readings within an overall uptrend (a pullback) are a different signal than oversold readings in a downtrend (potential continuation).
- Combined with support/resistance: an oversold reading at a known support level carries more weight than the same reading in open air.
FAQ
What does RSI above 70 mean?
Conventionally considered 'overbought' — it indicates strong recent positive momentum, not necessarily an imminent reversal, especially in a strong trend.
Is RSI reliable on its own?
It's more reliable combined with trend context, support/resistance, or divergence patterns than used as a standalone reversal signal.
What's RSI divergence?
When price makes a new high or low but RSI fails to confirm it with a corresponding new extreme — often read as a sign of weakening momentum.
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