Author of idea — Iurii Tokman, author of the MQL5 code — barabashkakvn. 

The Expert Advisor is based on the ADX Wilder and Ichimoku Kinko Hyo indicators. Lot is calculated based on risk percentage of margin.

Regarding the choice of the timeframe:

The ADX indicator is provided with a separate setting "adx_timeframe". Its default value is PEROID_M1.

The Ichimoku indicator does not have timeframe settings — the PERIOD_H1 timeframe is hard coded for it.

Also, in the trend direction detecting module, the bar Close price of the PERIOD_H1 timeframe is used:

   double sb = iIchimokuGet(CHIKOUSPAN_LINE,0);
   double close=iClose(0,m_symbol.Name(),PERIOD_H1);
   double cf=MathAbs(ts-ks)/m_symbol.Point();