How manually input a date onto Paramenters as a Buy signal on this date?

#1
Does Amibroker can achieve this effect? :rofl:

Suppose:
Buy = C > Ref(C, -1);
Sell = C < Ref(C, -1);
Buy = ExRem(Buy, Sell);
Sell = ExRem(Sell, Buy);

At the same time, in Parameters can manually input a date. And this date can equal to 'Buy' signal on this date.
Base on this manual input date, afl can keep execute the Sell = C < Ref(C, -1) for sell signal.
Also this specified date to mark the arrow onto dated bar on chart.

Please kindly help to write the code like as this. I will very appreciate for you. Much thanks! :rofl:
 

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