AverageDirectionalMovementIndexRating needs to be able to pass timeframe/bars in

I only seem to be able to get the ADX for the default timeframe e.g.

Indicators.AverageDirectionalMovementIndexRating(14);

But I want to be able to get it for a different timeframe e.g.

var bars = MarketData.GetBars(tf);
var adx = Indicators.AverageDirectionalMovementIndexRating(14, bars);

Please can you add this overload?

Thanks