input  int        InpFastEMA                     = 12;
input  int        InpSlowEMA                     = 26;
input  int        InpSignalSMA                   = 9;


#include <indicator_template_setup.mqh>

void start()
{
   double lot = 0.1;            // so 1 pip = 1 dollar
    if(Volume[0] != 1) return;   // only trade on candle beginning
    pipValue = get_pip_value();  // get pip value

    //
    // PUT YOUR CODE BELOW HERE:
    //
    int    signal  = 0;
    double indic   = get_MACD(0, 1, InpFastEMA, InpSlowEMA, InpSignalSMA);

    if(indic > 0) signal = +1;
    if(indic < 0) signal = -1;

    //
    // execute indicator signal
    if(signal == +1)                         // indicator returned BUY (+1)
    {                                        // ... so ...
        close_orders(-1);                     // close all SELL (-1) orders
        if(open_trades() == 0)                // and if there are no trades open
           trade       (+1);                  // go LONG (+1)
    }
    if(signal == -1)                         // indicator returned SELL (-1)
    {                                        // ... so ...
        close_orders(+1);                     // close all BUY (+1) orders
        if(open_trades() == 0)                // and if there are no trades open
           trade       (-1);                  // go SHORT (-1)
    }
}

/*
    Modes:
        0 == ExtMacdBuffer named '"MACD"', of type DRAW_HISTOGRAM
        1 == ExtSignalBuffer named '"Signal"', of type DRAW_LINE
*/
double get_MACD (int which_mode, int which_bar = 1, int InpFastEMA = 12, int InpSlowEMA = 26, int InpSignalSMA = 9)
{
    return iCustom(Symbol(), 0, "MACD", InpFastEMA, InpSlowEMA, InpSignalSMA, which_mode, which_bar);
}