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OmniOptions 3D Terminal

SPX Alpaca Paper API

Strict Live Pricing (Mark = (Bid + Ask) / 2) • Limit Orders Only • Zero Estimates

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Side:
Sell near Call, Buy far Call (same strike)
Primary Leg / Strategy Leg Contract Bid Ask Mark Vol OI Net Cost Max Gain Max Loss
Click "Scan & Build SPY Spreads" to pull live option chains and quotes from Alpaca.
Call Calendar Spread — Side-by-Side Long vs Short Strategy & Greeks Guide
2 Leg – Calendar/Diagonal 2 legs

Long Position (Net Debit)

Sell near Call, Buy far Call
Market Outlook
Neutral to Slightly Bullish
Greeks Dynamics
+Θ (Time Decay) • +ν (Vega Expansion)
Best Environment
Profits when asset stays near strike; near option decays faster.

Short Position (Net Credit)

Buy near Call, Sell far Call
Market Outlook
Inverse / Net Credit Seller
Greeks Dynamics
+Θ (Time Decay Credit) • -ν (Vega Crush)
Best Environment
Collect net credit premium when asset stays in target range or IV drops.
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