Actual number of visible candles and prices

[Felix]

I'm coding a program and I want to know how can I program in MQL4 an instruction that reads how many number of visible candles are actually in the active chart.

Also, I want to know is if possible to know also how many numbers of prices are visible at the moment and them values. With prices I mean the amount of prices that MT4 is showing in the right side of the chart

- 1.30690 

- 1.30495 

- 1.30105

[Simon Gniadkowski]

Read the documentation on the Window Functions

[William Roeder]

fjesq: that reads how many number of visible candles are actually in the active chart.

    top     = WindowPriceMax();
    bot     = WindowPriceMin();
    iLeft   = WindowFirstVisibleBar();
    iRight  = iLeft-WindowBarsPerChart();
    if (iRight < 0) iRight = 0;                             // Chart is shifted.