Quick Programming question | Forex Factory

Options

Permalinks
Print Thread

Similar Threads

Quick Programming Question 12 replies

Programming question.... 3 replies

Hedging Question - Quick Question Looking for A Quick Answer 1 reply

Question about MetaTrader programming 1 reply

Programming question 3 replies

Attachments: Quick Programming question
Exit Attachments

Quick Programming question

  • #1
  • First Post: Apr 19, 2015 2:12am Apr 19, 2015 2:12am
Hi All,

I'm stuck on a particular programming problem and would welcome any advice.

When I drop my EA on a chart, I want the EA to look back at previous bars (based on a particular timeframe) and count how may bars have passed since a particular event happened.

As an example, when I drop the EA on the chart (any timeframe) I want it to look back and count the number of daily bars that have occurred since the last gap up appeared on the daily chart. (ie where price opened higher that the previous bars close).

How would I go about doing this? I think this will need to be accomplished by using code containing a for-loop which would be placed under the OnInit() section of the EA??? but I'm not too sure...

Any advice/suggestions welcome....

Thanks in advance,

Chorlton
  • #2
  • Apr 19, 2015 2:16am Apr 19, 2015 2:16am
  •  FerruFx
  • Joined May 2007 | Status: MT4/MT5 EAs/Indicators/Alerts coder | 6,542 Posts | Online Now
Yes if you need the calculation to be done only once at apply, you can create your for() loop in OnInit().
MT4/MT5 EAs/Indicators/Alerts coder
  • #3
  • Apr 19, 2015 2:24am Apr 19, 2015 2:24am
Inserted Code
int OnInit()
{
    //make sure that there are at least 2 daily bars
    .....
    for (int i=0; i<iBars(Symbol(), PERIOD_D1)-1; i++) {
        if (iOpen(Symbol(), PERIOD_D1, i) - iClose(Symbol(), PERIOD_D1, i+1) > 0.0005) {
            Comment(i, " bars");
            break;
        }
    }
    return(INIT_SUCCEEDED);
}
Attached Image (click to enlarge)
Click to Enlarge Name: EURUSDDaily.png Size: 11 KB
  • #4
  • Apr 19, 2015 2:38am Apr 19, 2015 2:38am
I'd recommend not trying to do this in OnInit():
Quoting Metaquotes Documentation
It is not recommended to call start() from init() or to perform trade operations from init(), because during initialization values of information environment parameters may be not ready (information about charts, market prices and so on).

The likelihood of an issue is quite low, but nevertheless a more technically correct place to run it would be in OnTick(). You can use a static variable as a flag.
Inserted Code
void OnTick()
  {
   static bool HasRun=false;
   if(!HasRun)
     {
       // add your code here      
      HasRun=true;
     }
  • #5
  • Last Post: Apr 19, 2015 4:42am Apr 19, 2015 4:42am
Thanks everyone :-) The collective knowledge here is great.....
0 traders viewing now