Prop drawdown calculator
Topstep, Apex & FTMO traders: your exact distance to breach, trailing or static.
Open →Position size calculator
Forex lots or futures contracts, sized from the cash you're willing to risk.
Open →Firm-specific drawdown calculators
The calculator is the snapshot. Merlin keeps the running count.
Import your trades and Merlin computes these gauges after every close, and the Pre-Trade Check flags the trade that breaks your rules before you take it.
One click. No email, no card.