Вызов нужной части истории на график.

    #property copyright "Copyright © 2005, MetaQuotes Software Corp."
    #property link "https://www.metaquotes.net/"
    #property show_inputs
    extern int Nbar=200;
    #include <WinUser32.mqh>
    
    int start()
     {
    int h=WindowHandle(Symbol(),NULL);
    PostMessageA(h,WM_KEYDOWN,36,1);
    PostMessageA(h,WM_KEYUP,36,1);
    
    
    for (int i=0;i<Nbar;i++)PostMessageA(h,WM_KEYDOWN,123,1);
    PostMessageA(h,WM_KEYUP,123,1);