Real author:

asystem2000

The SlopeDirectionLine indicator with the timeframe selection option available in input parameters:

input ENUM_TIMEFRAMES TimeFrame=PERIOD_H4;  // Indicator chart period (timeframe) 

Originally this indicator has been written in MQL4 and was first published in the Code Base on 15.01.2008.

Figure 1. The SlopeDirectionLine_HTF indicator