[amibroker] Wanting to match tickers from an Industry list to a Watchlist and create List

[gmorlosky]

Does anyone know a better way to extract a list of tickers and not have a 
trailing "," , which I think is giving me more tickers than I want somehow.
SP1500N100 = Param("SP1500N100 ?", 1, 0 , 1, 1);
function GetSymbols()
{
 TickerList = "";
 SymbolList = CategoryGetSymbols(TickerCategory, TickerListNum);

for(n = 0; n < NumTickers; n++)
{
Ticker = StrExtract(SymbolList,n);
WL_SP1500N100 = CategoryGetSymbols(categoryWatchlist, 9); // get a list of 
symbols matching this watchlist

if ( SP1500N100 == 1 AND StrFind( WL_SP1500N100, Ticker ) )
        TickerList = TickerList + Ticker + ",";

if ( SP1500N100 == 0 )
        TickerList = TickerList + Ticker + ",";
}
return TickerList;
}