Question from a MQL4 Newbie

[BigDub]

Hi All,

‌

I‌ recently started writing indicators using MQL4, and I could not solve the issues that I faced in the mq4 file attached. In this simple testing file, I wish to copy my MACD array to the Short Array, but it seems that the Short Array does not store any data successfully.

H‌ope someone could kindly offer his/her help.

‌Thanks.

[William Roeder]

If you added #property strict you would know that the two EMAs, MACD and Signal have no size and therefor no values.

double MACD[];
int start(){
   double EMA_12[], EMA_26[];
   double Signal[];
:
   for(int i=limit-1; i>=0; i--){
      EMA_12[i] = ...
      EMA_26[i] = ...
      MACD[i]= EMA_12[i]-EMA_26[i];

      Signal[i] = alpha_9_1*MACD[i] + alpha_9*Signal[i+1];

[BigDub]

whroeder1:
If you added #property strict you would know that the two EMAs, MACD and Signal have no size and therefor no values.

double MACD[];
int start(){
   double EMA_12[], EMA_26[];
   double Signal[];
:
   for(int i=limit-1; i>=0; i--){
      EMA_12[i] = ...
      EMA_26[i] = ...
      MACD[i]= EMA_12[i]-EMA_26[i];

      Signal[i] = alpha_9_1*MACD[i] + alpha_9*Signal[i+1];

Thanks very much for the reply.

‌

I do not quite understand this. Do you suggest to put all definitions of these arrays to the top where Long and Short are defined? I tried so, and it still does not work.

‌

Although EMA_12, EMA_26 and Signal have no size at beginning, didn't I add values into these arrays in my loop function?

‌

[BigDub]

Can someone help please.