Okay lets say a simple moving average crossover system with ADX filter
The strategy longs when SMA5 is above SMA20 and ADX18 > 20. Close longs when SMA5 crossunder SMA20 . The opposite for shorts

{

function run()

vars Price = series(price());

SMA5 = series(SMA(seriesC(),5));
SMA20 = series(SMA(series(),20));
vars ADX18 = series(ADX(price,18));

if(SMA5[0] > SMA20[0] and ADX18[0]>20) enterLong();
else if(SMA5[0]< SMA20[0] and ADX18[0]>20) enterShort();

if(crossOver(SMA5, SMA20)) exitShort();
else if(crossUnder(SMA5, SMA20)) exitLong();

}


When I ran it, zorro says
"ADX(): wrong number of parameters"