EMA Alarm

Is it possible to set up an alarm when an EMA gets hit.

For 21 EMA on close,

EMAValue = iMA( Symbol(), 0/*Current*/, 21, 0, MODE_EMA, PRICE_CLOSE, 0 );

if ( Bid == EMAValue )
{
Alert("Bid price hit EMA");
}

I have no clue on the editor do I just paste it and save it as an indicator? also how would I make it so it would alert me at a live hit?

It will gives you a live hit

thanks