学编程，开头就卡了，问大虾这是什么定义？ defines: MACDOpenLevel(3),MACDCloseLevel(2); defines: MATrendPeriod(56);

/*[[  ; ; ; Name := te  ; ; ; Author := Copyright ?2004, MetaQuotes Software Corp.  ; ; ; Link := http://www.metaquotes.net/  ; ; ; Separate Window := No  ; ; ; First Color := Blue  ; ; ; First Draw Type := Line  ; ; ; First Symbol := 217  ; ; ; Use Second Data := No  ; ; ; Second Color := Red  ; ; ; Second Draw Type := Line  ; ; ; Second Symbol := 218 ]]*/ Variable : shift(0); SetLoopCount(0); // loop from first bar to current bar (with shift=0) For shift=Bars-1 Downto 0 Begin  ; ; ; SetIndexValue(shift,Lowest(MODE_LOW,6,6)); End; 这代码错在那里？怎么画不出来？什么线也没有。

/*[[ Name := te Author := Copyright ?2004, MetaQuotes Software Corp. Link := http://www.metaquotes.net/ Separate Window := No First Color := Blue First Draw Type := Line First Symbol := 217 Use Second Data := No Second Color := Red Second Draw Type := Line Second Symbol := 218 ]]*/ Variable : shift(0); SetLoopCount(0); // loop from first bar to current bar (with shift=0) For shift=Bars-1 Downto 0 Begin SetIndexValue(shift,low[Lowest(MODE_LOW,shift,6)]); End;