input:aa(2000,100,10000,100),dif(20,20,1000,1);//aa是初始的价位
up:aa+dif;
down:aa-dif;
mid:aa;
if cross(c,up) or cross(c,down) or cross(c,mid) then
begin
sell(1,1,market);
end
if cross(up,c) or cross(down,c) or cross(mid,c) then
begin
buy(1,1,market);
end
持仓:holding;