The next problem is where are you going to get historic data? For stocks you can use a provider like Norgate - good but expensive, or tiingo.com. You could backtest a directional trade and then execute it with credit spreads, for example. If you want historic option chain data that is going to be huge and expensive. I recommend ivolatility.com and they usually have some sort of "black friday sale" around now. ... Source: over 1 year ago
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