Lost money after costs, 82.4 points behind buy and hold.
RSI(2) mean reversion · 12 large UK companies
It returned −22.7% in total over the test, after costs; buying and holding over the same period returned +59.7%, 82.4 points more. It lost money after costs over the period. Its checks still ran and are shown below for reference: with no gain, a passed check doesn't point to an edge.
The rules: Enters after a sharp short-term drop (2-day RSI under 10) while the price is above its 200-day average; leaves when the 2-day RSI is back above 70.
StratLab ran these rules through its own backtest on every stock in the group, after costs, and through four checks: unseen years, nearby settings, a bad-luck drawdown and enough trades. The page shows the return beside buy and hold and the result of each check. A verdict describes the past, not what comes next, and nothing here is investment advice.