Lost money after costs, 2.1 points behind buy and hold.
Donchian 20/10 (turtle-style) · 4 rupee currency pairs
It returned −1.5% in total over the test, after costs; buying and holding over the same period returned +0.5%, 2.1 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 when the price closes above the highest high of the previous 20 days; leaves when it closes below the lowest low of the previous 10 days; the stop is 2 times the 14-day ATR below the entry.
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.