You can use two types of alerts - either price-based or formula-based alerts.
Price based alerts will be scrip specific. Formula based ones will apply to all the scrips in your watchlist of AB.
The syntax is as under:
//Code starts here
Buy = Cross(C,445.00) AND Name()=="FEDERALBNK";
AlertIf(Buy,"","Crossed 445.00",1);
Buy = Cross(MA(10),MA(20));
AlertIf(Buy,"","MA Crossover",1);
Sell = Cross(MA(20),MA(10));
AlertIf(Sell,"","MA Crossover",2);
///////////////////////////End of Code
Copy and paste it in a new afl file.
And run automatic analysis.
You should keep the Alert Output window in AB open to see the alerts.
( I am also a newbie to Amibroker and its coding. I am just sharing to the extent I know..)
