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Overview

The Payoff Simulator transforms your multi-leg strategy into an interactive profit/loss chart. Using real-time Black-Scholes calculations, it shows exactly how your position will perform across different underlying prices and time horizons.

Real-Time Calculation

Black-Scholes Greeks computed instantly as you adjust parameters

Time Decay Visualization

See how theta affects your position from today to expiration

Volatility Scenarios

Simulate IV expansion or contraction with the volatility shock slider

Key Metrics Dashboard

Max profit, max loss, break-even points, and net premium at a glance

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Understanding the Payoff Chart

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Chart Elements

The payoff chart displays a profit/loss curve that shows your strategy’s performance:
  • X-axis: Underlying price at the selected time horizon
  • Y-axis: Profit or loss in dollars
  • Green area: Profitable price zones
  • Red area: Loss zones
  • Zero line: Break-even (dashed white line)
The chart automatically adjusts the price range to show relevant strikes. It typically displays from 20% below to 20% above the current spot price.

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Color-Coded Performance

The area chart uses a gradient fill: 
Profit Zone (Green) → Above the zero line
Break-Even Zone     → At the zero line  
Loss Zone (Red)     → Below the zero line
Hover over any point to see:
  • Exact underlying price at that point
  • Profit/loss value

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Interactive Controls

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Volatility Shock Slider

Adjust the implied volatility (IV) to simulate market conditions: 
Range: -50% to +50% of current IV
Default: 0% (current market IV)
Use Cases:
  • Increase IV (+): Simulate a volatility spike (earnings, news events)
  • Decrease IV (-): Simulate volatility crush (post-earnings)
Vega-positive strategies (long options) benefit from IV increases. Vega-negative strategies (short options) benefit from IV decreases.

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Days to Expiration Slider

Select the time horizon for your analysis: 
Range: 1 day to your nearest expiration
Default: Maximum DTE of your strategy
The slider dynamically adjusts based on your shortest-dated leg. If you have a 30-day option, the slider maxes out at 30 days.
Theta decay accelerates as expiration approaches. The last 10 days show the most dramatic time decay for ATM options.

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Key Metrics Panel

The metrics panel displays four critical values:

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Net Premium

What it means: The initial cash flow when entering the strategy
  • Positive (green): You receive a credit (common for spreads, iron condors)
  • Negative (red): You pay a debit (common for long straddles, directional plays)
Example: +$450 means you received $450 to open the position

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Max Loss

What it means: The worst-case scenario loss if the underlying moves against you For defined-risk strategies (spreads, iron condors), this is the width of the spread minus the premium received: 
Bull Put Spread: $5 wide, $1.50 credit
Max Loss = ($5 - $1.50) × 100 = $350
For undefined-risk strategies like naked shorts or short strangles, max loss can be theoretically unlimited.

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Break-Even Points

What it means: Underlying prices where your profit/loss equals zero
  • Single-leg strategies typically have one break-even
  • Spreads have one or two break-evens
  • Iron condors have two break-evens (upper and lower)
Iron Condor example: $95.50 / $104.50
Profit zone: Between these two prices

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Max Profit

What it means: The best-case scenario profit For credit spreads and iron condors, max profit is typically the net premium received: 
Iron Condor: $450 credit = $450 max profit
Achieved when the underlying stays between short strikes at expiration

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Real-Time Black-Scholes Engine

The simulator recalculates the entire payoff surface whenever you:
  • Add or remove legs
  • Adjust the volatility shock
  • Move the days to expiration slider
  • Change the underlying ticker
Calculation includes:
  • Delta: Directional exposure
  • Gamma: Rate of delta change
  • Theta: Time decay per day
  • Vega: Sensitivity to IV changes
  • Rho: Interest rate sensitivity (0.05% risk-free rate)
The simulator runs in your browser using optimized JavaScript. Typical calculation time: under 100ms for a 4-leg strategy.

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Common Payoff Patterns

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Bullish Strategies

Bull Put Spread
  • Upward sloping line on the left
  • Flat max profit plateau on the right
  • One break-even point below current price
Profit if: Stock stays above short put strike
Max risk: Below long put strike

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Bearish Strategies

Bear Call Spread
  • Flat max profit plateau on the left
  • Downward sloping line on the right
  • One break-even point above current price
Profit if: Stock stays below short call strike
Max risk: Above long call strike

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Neutral Strategies

Iron Condor
  • Flat max profit in the center
  • Symmetrical slopes on both sides
  • Two break-even points (lower and upper)
Profit if: Stock stays between short strikes
Max risk: Outside the wings (either side)
Short Straddle/Strangle
  • Inverted V-shape (loss increases as price moves away from center)
  • Max profit at the center strike(s)
  • Two break-even points
  • Unlimited risk on both sides
Short straddles and strangles have undefined risk. Consider using iron condors instead for defined-risk neutral strategies.

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Scenario Analysis

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Earnings Volatility Play

Setup: Long straddle with volatility shock simulation
1

Build the Straddle

Buy ATM call and put with the same strike and expiration
2

Simulate IV Spike

Move the volatility shock slider to +30% or +50%
3

Check Profitability

See how much the position gains from IV expansion alone, even before the stock moves

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Theta Decay Observation

Setup: Any credit strategy (iron condor, short strangle)
1

Set Days to Max

Move the days slider to your expiration date
2

Walk Forward in Time

Gradually decrease the days slider from 30 → 20 → 10 → 5 → 1
3

Watch Theta Kick In

Observe how your profit increases as time passes (assuming price stays in the profit zone)

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Volatility Crush Analysis

Setup: Post-earnings scenario for credit strategies
1

Baseline Position

View your iron condor at current IV (volatility shock = 0%)
2

Simulate Crush

Move the volatility shock slider to -30%
3

Assess Impact

See how much you benefit from the IV contraction (green area expands)

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Best Practices

Test Extreme Scenarios

Always simulate ±2 standard deviation moves in both price and volatility

Understand Your Break-Evens

Know exactly where your strategy breaks even before entering the trade

Watch Theta Decay

Credit strategies benefit from time decay. Monitor theta daily

Plan Your Exit

Identify exit prices on the chart before entering the trade

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When to Use Different Time Horizons

Days to ExpirationUse Case
1-5 daysSee expiration P&L (intrinsic value only)
7-14 daysShort-term credit strategies, weekly options
15-30 daysStandard monthly options, theta decay analysis
30-60 daysCalendar spreads, diagonal strategies
60+ daysLEAPS, long-term directional plays
The simulator automatically limits your time horizon based on your shortest-dated leg. You cannot simulate beyond your nearest expiration.

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Troubleshooting

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Chart Shows Flat Line

Cause: No legs added to the strategy Solution: Build a strategy in the Option Builder first

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”Calculando super-superficie” Message

Cause: The Black-Scholes engine is computing the payoff surface Solution: Wait 1-2 seconds for calculation to complete

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Unexpected Profit Zones

Cause: Check for mismatched buy/sell actions on legs Solution: Review your active legs. Ensure buy/sell actions match your intended strategy

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Next Steps

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