A local replay lab for deliberate order practice
Reveal daily bars, queue a market order and inspect its next-open fill. Track cash, open risk and costs without a broker account.
Historical whole-unit cash model. No shorts, leverage, stop/limit orders, partial fills or live data. Open holdings remain marked at the last revealed close.
Prepare the replay
Use the invented sample or your own entitled daily data. Source is visible locally; this is not a secured blind test.
Changing draft inputs hides old results and blocks actions until reset. One currency, no conversion. CSV maximum 2 MB and 5,000 daily rows. Full model rules.
Restore a saved JSON session
Current replay state
Revealed daily close prices
Future bars are excluded from this chart. Read the source file only if that is part of your exercise.
Latest 30 revealed bars
| Date | Open | High | Low | Close |
|---|
Filled order ledger
| Fill date | Decision date | Side | Units | Price | Fee | Cash after |
|---|
Completed round trips
| Entry date | Exit date | Units | Total fees | Net |
|---|
All revealed close marks
| Date | Units | Cash | Market value | Equity | Drawdown |
|---|
Rejected orders
Keep the exercise
JSON includes the source CSV and decision log; it can reveal future prices and is your own backup. Exported closed trades omit any still-open position. There is no automatic local storage or broker connection.