I thought I could limit the number of alerts triggered by trigger using this:

extern int MaxWaiting_sec = 30;



if(trigger == 1)
{
int StartWaitingTime = GetTickCount();
if(GetTickCount() - StartWaitingTime > MaxWaiting_sec * 1000)
{

if(ShowAlert == true) {

Alert("Buy...........


But it does not seem to work, what am I doing wrong??