主题：均线公式

input:m(5),n(20);
ma5:ma(c,m);
ma10:ma(c,n);

if cross(ma5,ma10) then begin
 sellshort(holding<0,0,thisclose);
 buy(holding=0,0,thisclose);
end

if cross(ma10,ma5) then begin
 sell(holding>0,0,thisclose);
 buyshort(holding=0,0,thisclose);
end