How to run same afl for three symbols and ignore other signals in all 3 after first signal executed

#1
how to run same afl strategy in amibroker for three stocks(symbols) and after first trade order(signal) executed in any one of the stock, need to skip or stop other new signals or orders in all 3 stocks. is that possible? if so how?
i need it for auto trade through amibroker.
 

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