Calculators
Each calculator shows its working line by line under the result, so you can see exactly where every number came from and check it against your broker's figures.
Tools
Everything runs in your browser and nothing you type is sent anywhere. Where a result depends on a broker's own terms, such as a margin rate, a borrow fee or a day-count basis, the calculator asks for it; your account disclosures have the real values. To test what you know instead, try the quizzes.
Trade planning
- Trade risk worksheetShares from your stop, with the spread, stop slippage and a gap scenario priced in, so the risk you plan is the risk you carry.
- Merger arbitrage spread calculatorThe gap between a cash offer and the target price, what it pays per year if the deal closes, and the odds the price implies.
- VWAP calculatorPaste bars as high, low, close and volume and get the running volume-weighted average price with every step shown.
Accounts and costs
Rules and dates
- Day trade counterList your day trades and see the count in any rolling window of five business days, and when the oldest drops out.
- Settlement date calculatorWhen a stock trade settles under T+1, with weekends and your listed holidays skipped, and when the cash is free.
- Wash sale window calculatorThe 61 calendar days around a sale at a loss, and whether a repurchase you are planning falls inside.