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Hi,
I'm used to programming C during my years in university, but it's been a while and by all means, I'm not an expert. I've been seriously working on this for a couple of days and I cannot get a grip on it. I went through the tutorials, references, etc.
What I am trying to accomplish is rather simple:
Count the number of EMA crossovers (upcross in this case), create an array that's 1 at multiples of 3 corssovers(so to say after each 3rd crossover array=1), otherwise the array is 0.
Well, it goes like this:
EMA1=EMA(C,10);
EMA2=EMA(C,200);
Plot(EMA1,"EMA10", colorRed,styleLine);
Plot(EMA2,"EMA20",colorBlue,styleLine);
Buycross[0]=0;
exit[0]=0;
threshold=3;
multiplier=1;
Buycross= Cross(EMA1,EMA2);
Counter=Cum(Buycross); //<== Here the crossover are counted with CUM
// start loop
for(i=0; i<BarCount;i++)
{
if (Counter[i]==threshold*multiplier)
{
multiplier++ AND exit[i]=1; // "AND"-statement?!?!
}
}
printf("buycross:\n");
WriteVal(Buycross,1);
printf("counter:\n");
WriteVal(Counter,1);
printf("multiplier:\n");
WriteVal(multiplier,1);
printf("exit:\n");
WriteVal(exit,1);
Counter here is an array, as opposed to the 2nd example. Looks strange, but works.
Fine you might say, he did his job, so what's he asking for?
I only achieved this by some means of trial and error and I don't understand, why I have to add "AND" in the loop.So to say, I don't understand what I did. Ok, check this:
EMA1=EMA(C,10);
EMA2=EMA(C,200);
Plot(EMA1,"EMA10", colorRed,styleLine);
Plot(EMA2,"EMA20",colorBlue,styleLine);
Buycross[0]=0;
exit[0]=0;
COUNTER=0; //<==== Integer, variable
threshold=3;
multiplier=1;
Buycross= Cross(EMA1,EMA2);
// start loop
for(i=0; i<BarCount;i++)
{
if (buycross[i]==0)
{
counter++; //<=== simple increment
}
if (Counter==threshold*multiplier)
{
multiplier++; //<=== The two statements without AND
exit[i]=1; //<=== don't seem to work
}
}
printf("buycross:\n");
WriteVal(Buycross,1);
printf("counter:\n");
WriteVal(Counter,1);
printf("multiplier:\n");
WriteVal(multiplier,1);
printf("exit:\n");
WriteVal(exit,1);
Eventhough my varible "counter" is initialized, the loop would simply not do the increment. Like this, I cannot loop the process of crossover counting. "counter" goes from 2 to 5, sometimes it's doing nothing or even DEcreases. BTW, I'm checking every value of my OHLCV array from the interpretation window.
Also, the 2 statements would not be executed properly without the AND. I finally accomplished my task in the first code but I do not understand how AFL treats the variables / arrays in a loop. I believe I am not the first one to experience this problem and I would appreciate any kind of help or explanation. I just know that the 2nd code in C would rather work.
I considered varget, global varibale, but the problem didn't seem to get resolved. What am I missing? Where should I look to read up on this?
Thanks,
Matthias
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