主题：请问这个怎么写？

 VARIABLE:ss:=1;

input:p(26,20,100,8),s(12,5,40,4),m(9,2,60,6);
DIFF :EMA(CLOSE,S) - EMA(CLOSE,P);
DEA  :EMA(DIFF,M);
MACD1 :2*(DIFF-DEA), COLORSTICK;
macdjc:cross(diff,dea),NODRAW;//macd金叉
macdsc:cross(dea,diff),NODRAW;


if macdjc and holding=0 then
begin
buy(1,ss,market);    
end

if macdsc and holding>0 then
begin
sell(1,holding,market);    
if NUMPROFIT(1)<0 and ss<8 then ss:=ss*2;
if NUMPROFIT(1)>0 then ss:=1;
end