__________________
x.x.x.x.x. $$$ x.x.x.x.x.

Dear coder,

asking mt4 programming question,

if (!IsDemo())return(0);

what is means ? that only can run on demo account? can't run on real account?

thank you

from ocm

A simple question (i hope that): I have a buy position with trailing stop. I want to open a sell position when the open position hit the trailing stop, but the sell position must be open in the same price that the buy position close:
let me explain:
trailing stop:1.3075
buy orde:1.3080
if the buy order hit 1.3075, then the EA must open a short position at 1.3075
The problem is that the trailing is moving and i have to modified the open of sellstop acording to the triling movement.
I don{t know how can i code that
Please, help me.
Thanks in advance

Does MQL4 support pass by reference in the function? I want to return 2 values from the same function. Instead of writing all the code within start(), I want to create a function just to make the code cleaner and more easy to read. Can anyone point me to any previous EA that is using this type of technique or give me a one liner example?

I am familiar with programming in C/C++ but new to the MQL4 language. Any help is appreciated. Thanks in advance.

I figured out my answer!


Dave
<><<<

Dear All
I have an Ea That is working well. But I think that some parameters are not optimized.

All the parameters are putted in arrays:

Array1[0] = "EURUSD";/Currency
Array2[0] = 60;//ime frame
Arra3[0]= 20;//Parameter1
Array[4]=xx;//Parameter 2

What I need is to put thoses value as extern parameter that I can optimize them in back testing.

How to procced. A sample code is highly appreciated.

i Tried to put

extern int par1= 60

and

Arra3[0]= par1;

i've got par1 is not initialized.

Thanks for your help.

Kindest Regards

You could use strings to store you extern parameters.
extern string Par1 = "20,30,40,50";

Then you'll have int arrays.
int _par1[10];

Then you need function to parse the line and store everything in _par1[] variable that will be used in your program.

I copied some code from my indicator:

int line_cnt = 0;
double params[10];
string names[10];

int parse_line(string line){
int len = StringLen(line), i = 0, startPos = 0, par = -1;
if(len < 6) return(0);
string str;

while(i <= len){
if(len == i || StringGetChar(line, i) == sep1){
par++;
str = StringSubstr(line, startPos, i-startPos);
if(par < 6) params[line_cnt][par] = StrToInteger(str);
else if(par == 6) names[line_cnt] = str;
else{
if(StringFind(str, "false") != -1) nPar[line_cnt][par-6] = 0;
else if(StringFind(str, "true") != -1) nPar[line_cnt][par-6] = 1;
else nPar[line_cnt][par-6] = StrToDouble(str);
}
i++;
startPos = i;
}
i++;
}
//nPar[line_cnt][0] = par-6;
}


which can be used this way:
parse_line("Hehe,10,203,40,5.34");

I posted this on another forum, but still have yet to figure this out:

Hi everyone. I'm trying to code a simple MTF stochastic cross indicator, but I'm having a few problems. I used Scorpion's '3 MAs Cross Arrows' indicator as the base and modified it for stochastics (thank you Scorpion!).

Basically I want to have 2 stochastics; one for the current time frame and one for the 4 hour. If the current time frame stochastic turns up and the 4 hour stochastic is turned up, an arrow will be placed. If the current time frame stochastic turns up but the 4 hour stochastic is turned down, an arrow will not be placed.

The indicator I've attatched draws the arrows, however it will draw buy arrows when the 4 hour is turned down, and vice versa. I appreciate any help!

Attached Files

MTFStochCross.mq4 (2.8 KB, 15 views)

Can someone explain what Point means in MT4/MQL?

For example - in FX what would be the point value for EUR/USD? What about USD/JPY? Would it be .0001 for EUR and .01 for JPY?

How about index futures? What would be a point for ES, ER2, YM? .25, .10, 1?

Sorry I am trying to figure out exactly what it means by point because it seems more like it really means pip for FX or tick for futures. There is a big difference between point and tick though.

Thanks.

__________________
TraceJ

Hello Coder's Guru,

Just a little message to thank you for your pdf guides.
They are very helpful and well done.