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How to filter the recurring trading system signals? Hope!
Use the closing price of the previous period. Opening the warehouse was one cycle late.

According to the source code you gave.

There is no future function.

That's why what you said happened, which is what I said: because the closing price of the cycle has not been determined when the signal is given, there will be a moment when the condition is met and a moment when the condition is met, which will lead to repeated signals.

Only by pushing the closing cycle forward one cycle and adopting a certain closing price can there be a stable result.

As for how to modify it, it is very simple if you know the function of the software you use.

But I only know the function of writing analysts and flying foxes, hehe.

According to the analyst's writing is

CROSS(ref(DIFF, 1), ref(DEA, 1)) and ref(CLOSE, 1)>MA 13, bk;

CROSS(ref(DEA, 1),ref(DIFF, 1)),SP;

CROSS(ref(DEA, 1), ref(DIFF, 1)) and ref(CLOSE,1) < MA 13,SK;

CROSS(ref(DIFF, 1),ref(DEA, 1)),BP;

The trading system is a very simple thing, and some people do profit from it.

But most importantly, you must follow the signal of the system mechanically, otherwise it is meaningless.