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Direct access broker cost 2026: IBKR Pro $0 + $1 min, TradeStation $0 + $0.50 contract, Lightspeed $0.0045/share, DAS Trader Pro $150/mo, prop firm fees ($300-$5K). Real pricing.
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Python options backtesting 2026: OptionOmega, ORATS, vectorbt options, Lean Engine options data, py_vollib Black-Scholes, Tradier API, Polygon.io options pricing, code samples.
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Alpaca vs Interactive Brokers API 2026: Alpaca commission-free equities + REST/WebSocket vs IBKR Pro $0 + $1 min; paper trading; Python SDKs; crypto, options, futures support.
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