Free trader tools
Calculators for the rules and the arithmetic of day trading US small caps. Free, with nothing to sign up for.
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LULD band calculator
The limit up-limit down bands for a price, tier, date and time, including when the doubled closing band applies and how that rule changed in 2020.
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SSR (Rule 201) calculator
The price that puts a stock on the short sale restriction, whether it has triggered, and the trading days it lasts.
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Position size calculator
Shares to trade from your account, risk per trade, entry and stop, with the dollar risk, the R multiple to your target and a buying-power check.
Practice on a real past day in Hindsight Markets
Hindsight Markets replays real market days, every trade and every quote, with LULD bands and SSR applied under that day's rules. You trade it by hand with simulated money.