Trying to use a 20 period ATR on 15m tradebars, keep getting the error: 

Runtime Error: This is a forward only indicator: ATR20(BTCUSD_min) Input: 2018-05-30 18:30:00Z Previous: 2018-05-30 18:43:00Z

 

https://www.quantconnect.com/terminal/processCache?request=embedded_backtest_726d5a72d39ee682cfd82085e52662df.html

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