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sar1:SAR(10,2,20);ma30:ma(c,30);
if sar1<l and ma30<ref(ma30,1) then begin sellshort(1,0,market); buy(holding=0,1,market);end if sar1>h and ma30<ref(ma30,1) and then begin sell(1,0,market); buyshort(holding=0,1,market);end