[amibroker] One Trade per Month

[readshark]

I am looking to add some code to one of my trading systems to limit the number 
of trades to x amount per week.

I found a code that here that would limit the trades to one per day.  Any idea 
how I alter this to only get one trade on a longer time frame, preferably a 
week?

Thank you in advance.

Here is the link and the code I found. -> 
http://www.mail-archive.com/amibroker@yahoogroups.com/msg23006.html

for (i = 0; i < BarCount; i++)
{
    if (newDay[i])
        hadTradeToday = False;
    for (sig = bo.GetFirstSignal(i); sig; sig = bo.GetNextSignal(i))
    {
        if (sig.IsEntry() && sig.IsLong())
        {
            if (hadTradeToday)
                sig.PosSize = 0;
            else
                hadTradeToday = True;
        }
    }
    bo.ProcessTradeSignals(i);
}