以下红色部分不能理解，哪位高手帮丫解释一下：
////////////////////////////////////////////////////////////////////////
//参数设置：
INPUT:P(1,0,200,1){建仓量},P1(2,0,50,1){初始止损幅度}，P2(5,2,100,1){止盈幅度}，P3(30,5,60,5){回撤止盈};
VARIABLE:MAXPROFIT=0,{有仓位时最大获利幅度}VMIN = 090000;{用于隔夜高开或低开时间差}                
WIN1:=0;                                                           
WIN2:=0;//止盈、止损、回撤控制
 

////////////////////////////////////////////////////////////////////////
//账户信息：
资产:ASSET,PRECISION0,NOAXIS,COLORFF00FF;
可用现金:CASH(0),PRECISION0,LINETHICK0;
持仓:HOLDING,LINETHICK0;
胜率:PERCENTWIN,LINETHICK0;
交易次数:TOTALTRADE,LINETHICK0;

////////////////////////////////////////////////////////////////////////
//主程序

/////////////////

//信号模块：该模块主用于多空头及平仓信号的量化

{示例如下：开多：当MA10上穿MA20时，发出买入开仓交易指令； 平空：当MA10
上穿MA5时，发出卖出平仓交易指令；平多：当MA5上穿MA10时，发出买入平仓交
易指令；开空：当MA10下穿MA20时，发出开空交易指令；}

MA5: MA(CLOSE,5),PRECISION0,;                                                  
MA10:MA(CLOSE,10),PRECISION0,;                                                 
MA20:MA(CLOSE,20),PRECISION0,;                                                 
                                                                   
开多:=CROSS(MA10,MA20);                                            
平多:=CROSS(MA5,MA10);                                             
开空:=CROSS(MA20,MA10);                                            
平空:=CROSS(MA10,MA5);                                             
交易时间:=TIME>VMIN AND TIME<150000;
                             
                                                                   
////////////////
//图表日内交易模块:

 
  IF HOLDING=0 THEN BEGIN
     //多头开仓
     IF 交易时间 AND 开多 THEN BEGIN
         BUY(1,P,LIMITR,CLOSE);
         MAXPROFIT:=0;
     END
     
     //空头开仓
     IF 交易时间 AND 开空 THEN BEGIN
         BUYSHORT(1,P,LIMITR,CLOSE);
         MAXPROFIT:=0;
     END
 END
 
 IF HOLDING>0 THEN BEGIN
     //多头平仓
     IF 平多 THEN
         SELL(1,HOLDING,LIMITR,CLOSE);
 
     //多头收盘平仓

     IF NOT(交易时间) THEN
         SELL(1,HOLDING,LIMITR,CLOSE);
 
     //盈亏计算
     IF ENTERBARS>0 THEN BEGIN
         WIN1:=(C-ENTERPRICE)/ENTERPRICE*100;
         IF WIN1>MAXPROFIT THEN
             MAXPROFIT:=WIN1;
         WIN2:=(MAXPROFIT-WIN1)/MAXPROFIT*100;
     END
 
     //多头初始浮亏 P1％ 止损
     IF WIN1<-P1 THEN
         SELL(1,HOLDING,LIMITR,CLOSE);
 
     //多头利润大于 P2％ 止盈
     IF WIN1>P2 THEN
         SELL(1,HOLDING,LIMITR,CLOSE);
     
     //多头获利后回撤 P3％止盈
     IF WIN2>P3 AND OPENPROFIT>0 THEN
         SELL(1,HOLDING,LIMITR,CLOSE);
 END
 
 IF HOLDING<0 THEN BEGIN
    
     //空头平仓
     IF 平空 THEN
         SELLSHORT(1,HOLDING,LIMITR,CLOSE);
 
     //空头收盘平仓
     IF NOT(交易时间) THEN
         SELLSHORT(1,HOLDING,LIMITR,CLOSE);
     
     //盈亏计算
     IF ENTERBARS>0 THEN BEGIN
         WIN1:=(ENTERPRICE-C)/ENTERPRICE*100;
         IF WIN1>MAXPROFIT THEN
             MAXPROFIT:=WIN1;
         WIN2:=(MAXPROFIT-WIN1)/MAXPROFIT*100;
     END
 
     //空头初始浮亏超过 P1％ 止损
     IF WIN1<-P1 THEN
         SELLSHORT(1,HOLDING,LIMITR,CLOSE);
 
     //空头利润大于 P2％止盈
     IF WIN1>P2 THEN
         SELLSHORT(1,HOLDING,LIMITR,CLOSE);
     
     //空头回撤 P3％ 止盈
     IF WIN2>P3 AND OPENPROFIT>0 THEN
         SELLSHORT(1,HOLDING,LIMITR,CLOSE);
 END