ForexLens

Elite tier

Partials Lab

Partials Lab hands you a stated price model and a trade to manage: a partial at +1R, and what the stop does after +1R. You predict how expectancy and win rate compare with hands off, then 500 simulated trades run both ways. It teaches judging management by expectancy, not by how one trade felt.

Create a free account to play

Free, with a verified email address. An account saves your progress, and floors and tiers open as you level up.

What it teaches

Judging trade management by expectancy, not by how one trade felt.

  • Expectancy is the average result per trade over many trades, not the result of the last one.
  • On a fair walk no exit rule changes expectancy. Management only trades big wins for more small ones.
  • When the walk favours the trade, getting out early usually gives some of that away, even as the win rate goes up.
  • Management cannot create an edge that the entries do not have.

How a round plays

  1. Read the price model on the card: each step is half an R, up or down with a stated probability. It is a toy model, not a market.
  2. Set the management: a partial at +1R, and what the stop does after +1R. In some rounds one rule is switched on for you.
  3. Before anything runs, call it: against hands off, is the expectancy lower, the same or higher? And the win rate?
  4. Then 500 simulated trades run both ways on the same price paths, next to the exact answer from the maths.
  5. A run is six trades to manage and takes about four minutes.

How it is graded

You are graded on the two calls made before the run: whether your management has lower, the same or higher expectancy than hands off, and what it does to the win rate. The answers come from the stated model and its exact maths, so the result is a property of that model.

The honest note

The lab shows how management rules behave under one set of assumptions. It cannot tell you how they behave in a live market, only that the question deserves a test instead of a hunch.