Add an alert to Tradestation - Easy Language Indicator

I have a simple indicator that shows me the change of the price of a stock for various intervals. Like 2 minute change %, or 5 Minute price change %.

I would like an audio alert when the price change % exceeds a certain threshold, say, like 20%. If the price of the stock goes up more than 20% in 2 minutes, I want an audio alert.

This should be simple if you understand Easy Language. Here is the indicator code. I set the timeframe to Minutes and this code is set to 2 Minutes. I need an input box where I can tell the indicator to alert based on a specific %, like 5%, 10% or 15% etc.

Vars: cng(0);

cng = ((close / close[2] ) -1 ) ;
If Close[1] > 0 then
cng = ((Close / Close[2] ) -1 ) ;

Plot1(cng);

If Plot1 > 0 then
SetPlotColor(1, GREEN)
Else
SetPlotColor(1, RED);

Please feel free to let me know if you are interested.