The program I wrote: (Although the result is not good, the program is correct)
////is followed by a text description, which you don't need to write when writing the model.
MA8:=MA(CLOSE,8); //Simple moving average of closing price of 8 cycles
MA2 1:=MA (closing, 21); //2 1 Simple moving average of periodic closing price
Cross (MA8, MA2 1), bk; //When MA8 passes MA2 1, send a buy and open order.
CROSS(MA2 1,MA8),SK; //When MA2 1 and MA8 are threaded, issue a sell and open the transaction instruction.
(CLOSE-MA2 1)> 100,BP; //
(ma 2 1- off) > 100, sp; //