主题：求解 为什么历史测试成交里面没有开空单

MA1:=MA(OPEN,20);                                                                                                                                                                                                                                                     
IF HOLDING = 0 AND MA1 > REF(MA1,1) AND REF(MA1,1) > REF(MA1,2) AND REF(MA1,2) > REF(MA1,3) THEN                                                                                                                                                                           
    BS_DIR := 1;                                                                                                                                                                                                                                                         
IF HOLDING = 0 AND MA1 < REF(MA1,1) AND REF(MA1,1) < REF(MA1,2) AND REF(MA1,2) < REF(MA1,3) THEN                                                                                                                                                                           
    BS_DIR := -1;                                                                                                                                                                                                                                                        
PBS_DIR := 0;                                                                                                                                                                                                                                                         
IF HOLDING > 0 AND CLOSE < ENTERPRICE-10 THEN                                                                                                                                                                                                                          
 PBS_DIR := 1;                                                                                                                                                                                                                                                        
IF HOLDING < 0 AND CLOSE> ENTERPRICE+10 THEN                                                                                                                                                                                                                           
 PBS_DIR := -1;