About this app

Type a pattern and flags and watch matches highlight in the test string as you go, with invalid patterns reported rather than swallowed. Counts matches, shows how much of the text they cover, breaks capture groups into a table, and ships presets for dates, URLs and currency amounts.

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Win rates and risk grades are computed by Masterboard from tracked trade outcomes after the strategy is assessed — not self-reported by sellers. Past performance does not guarantee future results.