主题：最高价突破EMA均线平空开多，最低价突破EMA均线平多开空，图表程序如何写?

ss:=1;

sema:ref(ema(c,10),1);

if h>sema and sema>ref(sema,1) then begin

   sellshort(1,0,market);

   buy(holding=0,1,market);

end

if l<sema and sema<ref(sema,1) then begin

    sell(1,0,market);

    buyshort(holding=0,1,market);

end