Educational reference. Measured from 103 recorded 10m bars of ES (E-mini S&P 500) on Friday, September 11, 2026.
RSI crossed above 70 7 separate times during the session, and the typical visit lasted 10 minutes. Across the whole session it sat above 70 for 19.4% of the time, between 30 and 70 for 80.6%, and below 30 for 0.0%.
| Band | Share of session | Bars | Separate visits | Median visit | Longest visit | |
|---|---|---|---|---|---|---|
| Above 70 | 19.4% | 20 | 7 | 10 min | 100 min | |
| Between 30 and 70 | 80.6% | 83 | 8 | 65 min | 420 min | |
| Below 30 | 0.0% | 0 | 0 | 0 min | 0 min |
RSI compares the size of recent gains with recent losses, so a reading above 70 says buying has dominated the last 14 bars — not that price is high. A long stay above 70 is a market trending up, which is the opposite of the reversal the word 'overbought' suggests.
Here the reading entered overbought territory 7 times, with a median stay of 10 minutes and a longest of 100. A brief excursion above 70 that resolves in minutes is noise on this timeframe. A sustained one is the signature of a trend that is still running, and selling into it is how traders get run over.