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The page you were reading is not available in English yet. Here is the English guides directory.
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Research guides
Each guide gives a direct answer, the formula, a complete worked example and its limits.
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Maximum Drawdown: Peak, Trough, and Recovery
The largest fall from a previous peak to a later trough, recomputed step by step with four observations, plus the gain needed to recover.
Backtest Trust Check: Was the Data Available?
A hypothetical timeline separating when data describes, when it becomes available and when a trade can happen, with five checks against look-ahead bias.
CAGR: Formula, Example, and Limits
The constant yearly rate that turns a starting value into an ending value: 100 to 121 over two years, step by step, with its input rules and limits.
Why Rules Need TRUE, FALSE, and UNKNOWN
Why a missing value should not be treated as FALSE in a screening rule, with the five key combinations and a three-security example.