Pro labs

Where the market pages
get hands-on.

Three labs that turn the explainers into numbers you can drag: build the payoff diagram for four long-side options structures, see the win rate binary payouts quietly demand, and run 200 simulated accounts to learn why position sizing — not prediction — decides who survives. Educational math only, free, no account.

Payoff puzzle Binary math Risk of ruin
Lab 01 · Payoff

Options Payoff Puzzle

Pick a structure, drag the strikes and premium, and watch the profit-and-loss line at expiry take shape. The spot reference is fixed at 100 — everything else is yours to bend.

Spot 100 Options explainer
Build the trade
$100
$6.00
Read the shape

Long call

Lab 02 · Binary math

Binary Breakeven Lab

A binary option pays a fixed percent of your stake when you are right and takes the whole stake when you are wrong. Drag the payout and your win rate — the math decides the verdict, instantly.

Binary explainer
Set the terms

Your binary contract

80%
50%

Stake is fixed at $1 per trade. EV = win rate × payout − loss rate.

Drag a slider to put your contract on trial.
The wall to climb: at the typical 80% payout you must win 55.6% of trades just to break even. "50/50" is not a neutral coin flip — it is a slow bleed of about $5 per $100 staked.
EV per $1 staked—expected result per trade
Break-even win rate—100 ÷ (1 + payout)
Your win rate—what you actually hit
Gap to break-even—edge or shortfall, in points
Lab 03 · Risk of ruin

Portfolio Tycoon

200 simulated accounts, 100 trades each, identical rules. Every account starts at $10,000 and risks a fixed slice of its current equity per trade. Same trades, different luck — watch what sizing does to the spread of outcomes.

Lesson: the 1% rule
Press run to deal out 200 accounts.
Dial the risk

Every account plays by the same rules

2.0%
45%
+1.8R

Wins pay the R multiple on the amount risked; losses always cost 1R. Red dashed line: the 50% drawdown graveyard. Run again after changing the sliders.

Median end—run the sim
Best account—the lucky tail
Worst account—the other tail
Fell below 50%—accounts that visited the graveyard

Raising risk per trade raises the ceiling and the graveyard. Same entries, same win rate — sizing only decides how deep a losing streak digs and whether you last long enough to recover. That is why the 1% rule comes before every other skill.

Educational math only. These labs ignore fees, slippage, margin and taxes; real trading adds all four. Nothing here is financial advice.