WindowPriceMax for other symbols differet from the current chart

 

Please i need help getting windowpricemax for all symbols in multi currency EA.

How to get Maximum price chart for each of the symbol and timeframe.

 double lower_range= WindowPriceMin(0)+ 0.09*(WindowPriceMax()-WindowPriceMin());
  double upper_range = WindowPriceMax(0)- 0.09*(WindowPriceMax()-WindowPriceMin()); 

I want this to give me a value for all other symbols and timeframes that i am interested in apart from current chart.

 
William Roeder:
CHART_PRICE_MAX & CHART_PRICE_MIN

I mean like getting Pricemax if EURUSD H1 when i am on USDJPY 15M chart

like WindowPriceMax(symbol,Period) if i can something similar