A printable rule checklist in vanilla JS, with no build step

A prop firm rulebook is written in percentages. A trading platform shows dollars. The gap between those two units is where most evaluation failures happen, and it is a UI problem, not a discipline problem.

So the tool is small: pick a plan, enter an account size, get every limit in cash, printable. Everything below is the reasoning behind it — no framework, no build step, one file that still works when the network does not.

The conversion is one function, with a rule about rounding

const cash = ( accountSize , pct ) => Math . floor ( accountSize * pct / 100 );

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Math.floor , not Math.round . If the true daily limit is $4,999.50 and you display $5,000, a trader can be stopped out and believe they were inside the rule.…