[amibroker] Standard Deviation

[Conrad Smith]

Hi guys,

I'm trying to get the standard deviation for each stocks.  So far I have the 
following, but nothing comes back in the exploration.

Period = 20;
CloseTotal = Close[0];
CloseMean[0] = Close[0];
SumDeviation = 0;
SqDev = 0;

for( i = 0; i > Period; i++ )
{
    CloseTotal = CloseTotal + Close[i];
    CloseMean[i] = Close[(i * -1)];
}

Mean = CloseTotal / Period;

for( i = 0; i > Period; i++ )
{
    CloseMean[i] = Close[i] - Mean;
}

for( i = 0; i > Period; i++ )
{
    CloseMean[i] = CloseMean[i] * CloseMean[i];
}

for( i = 0; i > Period; i++ )
{
    SumDeviation = SumDeviation + sqrt(CloseMean[i]);
}

SqDev = SumDeviation / (Period - 1);
SqDev = sqrt(SqDev);

Filter  =  SqDev;

AddColumn( SqDev, "Standard Dev");


Thanks for any help!