How to get last momentum

[Kima]

I want it to go short when 'last momentum > now momentum'. But how can i get the last momentum? 

The momentum documentation:

Momentum is calculated as a ratio of today’s price to the price n periods ago:

MOMENTUM = CLOSE (i) / CLOSE (i - n) * 100

Where:

CLOSE (i) — close price of the current bar;

CLOSE (i - n) — close price n bars ago.

 

So i thought in my case:

// Code 

int MOMENTUM_now = CLOSE (symbol[i], 0 ) / CLOSE (symbol[i] - 1, 0) * 100 // it gets error: '-' - illegal operation

int MOMENTUM_last = CLOSE (symbol[i] - 1, 0) / CLOSE (symbol[i] - 2, 0) * 100

 

if( MOMENTUM_last > MOMENTUM_now){

 OpenFromMarket(symbol[i],ORDER_TYPE_SELL,GetLot(symbol[i]),Stop,Take); 

            Sleep(3000);

} 

 

double Close(string symb,int bar)

  {

   double cl[1]={0};

   CopyClose(symb,Time_Frame,bar,1,cl);

   return(cl[0]);

  } 

Can someone help me in the right direction?

[Andrey Barinov]

int n=1;  // Any other value >=1, indicating how many bars back the second price is.
double MOMENTUM_now = Close (symbol[i], 0 ) / Close (symbol[i] , n) * 100 // it gets error: '-' - illegal operation

double MOMENTUM_last = Close (symbol[i] , 1) / Close (symbol[i] , 1+n) * 100

 

if( MOMENTUM_last > MOMENTUM_now){

 OpenFromMarket(symbol[i],ORDER_TYPE_SELL,GetLot(symbol[i]),Stop,Take); 

            Sleep(3000);

} 

 

double Close(string symb,int bar)

  {

   double cl[1]={0};

   CopyClose(symb,Time_Frame,bar,1,cl);

   return(cl[0]);

  } 

[Kima]

Thanks for the explanation. With the extra ';' it is working now.  

 

Last edit:

This works best for me. It is with the sum from the momentum indicator:

        int n_moment= 14;  // Any other value >=1, indicating how many bars back the second price is, (this is the period value of from the momentum indicator)
        double MOMENTUM_last = Close(symbol[i], 1)*100 / Close (symbol[i], n_moment);
        double MOMENTUM_now = Close(symbol[i], 0 )*100 / Close(symbol[i], n_moment-1);