Is this script correct?

I'm in the make of a Williams % EA, I wrote this:

ext int WPRLevelB=-80
ext int WPRLevelS=-20

bool = buysig, sellsig;
int lastsig

double wpr= iWPR(NULL,0,WPRLen,shift);
if (wpr>WPRLevelB)
{buysig=true;
sellsig=false;
}
if (wpr<WPRLevelS)
{sellsig=true;
buysig=false;
}
Despite there are no errors decompiling it I think something is missing (I've to wait till tomorrow for test it), any advise is wellcome, or if anybody has a Williams %Range EA with two llevels for sell and buy please share it.
Thank you in advance.

it seems it is correct. at the end of the script you should add command for open order:
hth

no errors decompiling? This will not compile without errors.

 

1. ext should probably be extern.
2. No start() function.
3. Missing semicolons.
4. Erroneous variable declaration: 'bool = buysig, sellsg;'.
5. Variables 'shift' and 'WPRLen' are not declared.

http://www.metatrader.info/node/62
http://articles.mql4.com/404
http://articles.mql4.com/516
http://articles.mql4.com/536

Ohh, Xaphod and sangmane, I apologize for my bad English. The ea is already done, my doubt is with that piece of code, why? because if I order buy when WPR is >-80 the ea will open a trade with no control when the condition is true and if at lets say -75 its < -20 so is also the condition for sell, my question is: is there a way to write the cross over that levels, buy when WPR crosses up -80 and sell when WPR crosses down -20.
Thank you for your time
Regards