Algorithm Reference

Common Errors

Using Data

Runtime Error: 'AAPL' wasn't found in the TradeBars object

You're attempting to access data which is not in the TradeBars dictionary. There are two key reasons for this: You have not requested data for this security in the Initialize method, or the data has gaps because it is not filling forward, or you're accessing the data after-hours when there won't be any price information.

Backtest Error: Error Initializing Algorithm: Date Invalid

You may have accidentally put invalid start and end dates into your algorithm. Or potentially you pressed backtest before the algorithm was fully saved. Please Ctrl+S to save the document, wait for its confirmation, and then click Backtest again.

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