How to code? - Page 106

Ronald Raygun · #**1051** (**permalink**) 06-30-2008, 02:28 AM

Quote:

Originally Posted by Big Be

I want to grab the highest and lowest values of an indicator over an entire chart. A while ago I tried what I thought should have worked, from within an EA, but it didn't.
(Sorry I don't have that attempt now to show you.)

Any ideas?

Big Be

using the iHighest function:

int iHighest( string symbol, int timeframe, int type, int count=WHOLE_ARRAY, int start=0)

set the count to "Bars" so.

iHighest(NULL, 0, 3, Bars, 0);

At least that what I think would work. Just check in your chart settings how many bars you keep in history. Default I think is 52,000 bars.

luxinterior · #**1052** (**permalink**) 06-30-2008, 06:28 AM

That works for price. He's wanting to find the highest and lowest of an idicator.

Lux

Devil2000 · #**1053** (**permalink**) 06-30-2008, 07:05 AM

Hello,

You can try this :

Code:

....

int highest=0, lowest=0, bar=WindowBarsPerChart();

for(int shift=0;shift<bar;shift++)
 {
    double indie=iCustom(.........,shift);

    if(highest<indie) highest=indie;

    if(lowest==0) lowest=indie;
    if(lowest>indie) lowest=indie;
 } 

.....

note: this code calculating the current open candle too, if you want to calculate the closed candle only, use shift=1.

Hope this helps,
Ardie

IN10TION · #**1054** (**permalink**) 06-30-2008, 10:31 AM

:: iBarShift will find for you the bar that start on that day/hour... or also the end bar for that day:hour... (depends what timeframe or chart you want to start to find your high/low).

int iBarShift( string symbol, int timeframe, datetime time, bool exact=false)

next...

:: use those bar positions to find the results of iHighest and iLowest

int iHighest( string symbol, int timeframe, int type, int count=WHOLE_ARRAY, int start=0)
int iLowest( string symbol, int timeframe, int type, int count=WHOLE_ARRAY, int start=0)

:: results & done , don't use any loops in this!

Devil2000 · #**1055** (**permalink**) 06-30-2008, 02:35 PM

Hello,

I'm looking to find a way to refresh a repaint indicator for every x minutes.
The only way to refresh it currently, is to click in the indicator on the chart and then click "ok". Can we automate it with MQL4 code?
I found something on codersguru's site, Programmatically Refresh your charts | www.metatrader.info, but it seems not working for me. Or is there anybody has try it and get different result (working)?

Thank you

IngvarDagmar · #**1056** (**permalink**) 07-02-2008, 12:28 AM

Sorry for my Englsih.

I want count number times condition is true only once per bar. Computer add up many times per bar. What wrong I do?

luxinterior · #**1057** (**permalink**) 07-02-2008, 01:25 AM

Quote:

Originally Posted by IngvarDagmar

Sorry for my Englsih.

I want count number times condition is true only once per bar. Computer add up many times per bar. What wrong I do?

Use a function like this...

PHP Code:


			
bool NewBar() {



    static datetime LastTime = 0;



    if (Time[0] != LastTime) {

        LastTime = Time[0];        

        return (true);

    } else

        return (false);

}

Then put an if statement round your main code, like...

PHP Code:


			
if(NewBar() == true){

// do the main processing here

}

Hope that helps.

Lux

TheRumpledOne · #**1058** (**permalink**) 07-02-2008, 01:40 AM

That was nice of you, Lux.

I found this:

Only process each bar once - MQL4 forum

Automated 2008.01.15 18:54 You could execute your code at the very first tick of a new bar ( i.e. right after the previous bar has closed ).
Here's a function that will return TRUE if a new bar has just formed:
// This function returns TRUE at the very first tick a bar i.e. after the previous bar has just closed
bool NewBar()
{
if(PreviousBarTime<Time[0])
{
PreviousBarTime = Time[0];
return(true);
}

return(false); // in case if - else statement is not executed
} you need to declare datetime PreviousBarTime at the beginning of your EA...
then in your code you could just use
if ( NewBar() )
{
...... code you need to be executed after a bar has closed here ....
} thank you
automatedfx@gmail.com

---------------------------------------------------

I noticed you used STATIC... I looked it up... what's the advantage of using STATIC vs a global variable?

cresp · #**1059** (**permalink**) 07-02-2008, 06:32 PM

please help. i would like to find or need help creating an ea with the following input parameters. four separate trade entries each having no. of lots, stop loss, trailing stop, break even, and profit target. trades will open upon clicking on expert advisor button.

thank you

mancai · #**1060** (**permalink**) 07-03-2008, 01:52 PM

I found this EA at MQL4 forum, quite an interesting EA.

could somebody help to add a trailing stop option which can set trailing stop only activate after the hit profit value that I set?

TheMasterMind2.mq4

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