Question about using D+ and D- of ADX

I am new at Quantconnect and I am trying to determine the trend using ADX. My plan is to determine the strength of the trend using ADX value, and determining direction comparing D+ and D-. However, after consulting the documentation, I haven't figured out how to access those values correctly, any tips? Thanks

def determine_trend(self):
trending = self.adx.Current.Value >= ADX_MIN_VALUE_FOR_TREND
up = self.adx.PositiveDirectionalIndex.Value > self.adx.NegativeDirectionalIndex.Value
down = self.adx.NegativeDirectionalIndex.Value > self.PositiveDirectionalIndex.Value
return trending, up, down

The error I get is 

Runtime Error: AttributeError : '0, Culture=neutral, PublicKeyToken=null]]' object has no attribute 'Value'
at OnData in 48
at determine_trend in 53
AttributeError : '0, Culture=neutral, PublicKeyToken=null]]' object has no attribute 'Value' (Open Stacktrace)

Update Backtest

For the indicator properties like PositiveDirectionalIndex and NegativeDirectionalIndex, you should also use the Current.Value to retrieve the value

For example self.adx.PositiveDirectionalIndex.Value.


That worked, thanks


Update Backtest


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