Position Modeler
Model it first
Drag strikes on a live payoff curve and slice it by date. See exactly what the position risks before you commit a dollar.
Learn more →P&L attribution
The anatomy of every option you trade.
A precise decomposition of your options P&L into delta, gamma, theta and vega. See how direction, time and volatility contribute to your results, reconciled against your broker's own numbers.
No credit card required. Every account* starts with 14 days of Pro: connect your real brokerage book from day one, and keep modeling for free after.
up to99%P&L attributed
7Greeks tracked
up to60sReal-time refresh
+$0
Iron condor · Net P&L · 09:30 ET
DeltaDirection+$0
GammaCurvature+$0
ThetaTime decay+$0
VegaVolatility+$0
Option risk profiles
See the shape of your risk.
Compare potential profit and loss across underlying prices. Explore an iron condor, a long call, a calendar or a straddle, then model your own trade.
Risk ProfileIron condor · 14 DTE
Delta +85Gamma −310Theta +525Vega −120Net +180
Scrub the price · Iron condor
Your P&L at every price, before you're in it.
+$0Position P&L
5,400Underlying
At the money
↓ scroll or point at the curve to scrub
Try it · Iron condor
Drag the strikes. Watch the risk change.
Drag the strike. Watch the risk change.
A live option P&L calculator for payoff, breakevens and max risk, recomputed as you drag.
A short strangle wrapped in protective wings: an iron condor on a synthetic underlying at 5,400. Slide the short put and short call; the payoff, breakevens, and dollar risk recompute as you go.
Pick a structure, then drag its strikes on the ruler. Add a call or put from the button above the chart to model a change against the sample book.
Add legs and drag strikes. The untouched book stays on the chart as a dashed line so you can see what your change did.
Net credit$17.24per share · illustrative pricing
Max profit$1,724.00between the short strikes
Max loss−$3,276.00beyond either wing
Breakevens5,282.76 · 5,517.24at expiration
Sample live book from brokerIron condor
Add a leg
Drag the put and call chips. Wings stay 50 points out. Illustrative pricing, not a quote.
Inside the product
Three windows into one book.
Model a position before you trade it, watch its P&L come apart while you hold it, and study the anatomy after it closes. One connected loop.
P&L Attribution
Delta+$412.60
Gamma−$188.35
Theta+$96.20
Vega−$154.05
Net P&L+$166.40
Know why it moved
Every day’s profit split into Delta, Gamma, Theta and Vega, the same breakdown a trading desk runs at every close, so you know which force earned it and not just the net.
Learn more →Trade Journal
Closed tradeRealized
Iron CondorXSP · 4 legs · closed Aug 1+$342.18
Calendar Call SpreadSPY · 2 legs · closed Jul 28+$87.15
Bull Put SpreadQQQ · 2 legs · closed Jul 24−$63.40
Learn from every close
Closed trades reconstructed from your real fills, named by strategy and graded by the force that actually paid you.
Learn more →Works with your broker
Interactive Brokersdirect
Wealthsimple
Charles Schwab
tastytrade
Robinhood
E*TRADE
Webull
Questrade+ more. See all 21 supported brokers →
From the blog
The thinking behind the tool.
Greeks
Why did my P&L move? Greek attribution, explained
Your position made $12 today. That number is hiding four forces that each moved hundreds of dollars. Greek attribution shows you which ones, and why the net tells you almost nothing.
6 min read
Fundamentals
How to read a risk profile chart
The expiration payoff diagram is the most famous chart in options, and the least relevant to how your trade actually behaves. Here is how to read the curves that matter.
6 min read
Strategy
Choosing strikes with probability, not hope
Strike selection is where most options trades are actually decided. Delta, the expected move, and the gap between win rate and expectancy give you a numerical way to choose.
6 min read
The full picture
Every dollar, accounted for.
Every account* starts with 14 days of Pro, no card: connect your brokerage, watch every dollar reconciled and attributed to the force that earned it, and decide with your real book in front of you. Nothing is charged until you choose to upgrade.
Members steer the roadmap: feature requests go straight from Settings into it. Questions, or want a look inside? Get in touch.
*Eligible new accounts. See the free trial terms.