How to code? - Page 104

mladen · #**1031** (**permalink**) 06-16-2008, 05:09 PM

Metatrader takes arguments for trigonometric functions in radians
You should do something like this :

PHP Code:


			
#define Pi 3.141592653589793238462643
   
   MathCos(10.00*Pi/180.00);

Quote:

Originally Posted by graemenash

Hi,

I am currently coding up in indicator which uses the MathCos function in MQL.

The problem is that it seems to be returning an incorrect value.

For example,

PHP Code:


			
MathCos(10);

returns a value of -0.8391, while the TradeStation COSINE function, and the web-based cosine calculator at Basic Maths Functions both return a value of 0.9848.

Is this a known bug? My indicator can't be written unless this function works correctly so I hope there is a solution!

Thanks

TheRumpledOne · #**1032** (**permalink**) 06-16-2008, 07:25 PM

define a global variable pBars

int pBars = -1 ;

Code:

if(pBars != Bars) {  // only once per bar
if (  
Close[1] == Open[1]&& //DOJI 
flgrs==0)
{
alertdoji = 1;
flgrs=1;
}
else
{
flgrs=0;
}
pBars = Bars ; // assign pBars
}// end if pBars

See if that helps.

graemenash · #**1033** (**permalink**) 06-17-2008, 12:24 PM

Hi again

I am creating an indicator which draws a line across the chart (in a similar way to a moving average does).

The line is plotted with values taken from a buffer.

I'd like the line to be drawn green if the value on the current bar is higher than the value on the previous bar, and red if it is lower.

How can I do this?

Thanks in advance for any help.

graemenash · #**1034** (**permalink**) 06-17-2008, 12:27 PM

Basically I'd like it to look like this:

graemenash · #**1035** (**permalink**) 06-17-2008, 12:36 PM

Why did my last post get moved from the main programming forum to the end of this thread?

(Thanks for the MathCos help too guys!)

graemenash · #**1036** (**permalink**) 06-17-2008, 01:14 PM

Above problem has been solved

xfiles · #**1037** (**permalink**) 06-18-2008, 11:43 AM

Hi,

At the moment ea : boincinPipEA_BigBear_nonlagdot uses as a main indicator : NonLagZigZag_v2 and ZigZag Pointer , and as a filter nonlagdot.

Is it posible to delate NonLagZigZag_v2 and ZigZag Pointer from source code and make nonlagdot main indicator?

Im not good in programming, any idea what to change?

Thank you for your help.

mladen · #**1038** (**permalink**) 06-18-2008, 12:48 PM

That picture from tradestation shows an interesting thing to us complaining at Metatrader problems : basically in tradestation if you are trying to simply apply a color to a current bar it is going to work OK in all the modes (histo, point, cross, ... all the styles tradestation knows) EXCEPT line style. If you try to change the color in a line style the color change is going to lag one bar and in order to make it properly source must be changed (in the case of that picture to something like this

PHP Code:


			
if Value1>Value1[1] then
        SetPlotColor[1](1,Green)
else    SetPlotColor[1](1,red);

meaning, you have to change the color of the PREVIOUS bar
this peace of code also means that you can not change the style from line style because then the color is going to FORECAST the change and thus it will make it a classical case of repainting indicator

so every coding language has its problems, and maybe we should simply find solutions in our environment (solutions are there, all we have to do is to find them out)

Quote:

Originally Posted by graemenash

Basically I'd like it to look like this:

luxinterior · #**1039** (**permalink**) 06-18-2008, 01:19 PM

Quote:

Originally Posted by mladen

every coding language has its problems, and maybe we should simply find solutions in our environment (solutions are there, all we have to do is to find them out)

Nice comment! Totally agree.

Lux

panteraschoice · #**1040** (**permalink**) 06-20-2008, 10:23 AM

hi,

I want to close all trades if % gain is achieved on a weekly base.
So I need to know the accountbalance sundayevening 24.00 - no problem.
I need to know equity on sundayevening 24.00 - no problem.
But how do I store these? And how to let the ea read these values, for if there is a powerbreakdown the ea will have to start again and have to read the values from the stored place.
I know how to do this in VB, but how do I do this in mql?
I would be gratefull if someone can point that out.