alert needed when price cross MA

Hello, Can anyone share a simple indicator, I need a moving average with alert, when price crosses MA. I found here alerts when several MA's cross but it is not what I am looking for. I need an alert when price crosses simple moving average. I looked through the forum with search but didnt find anything. thanks to everyone who can help.

Use 1 as the fast moving average and whatever you want the other moving average as the slow.

thank you very much for a reply. I tried to do the way you suggest, but i got confusing alerts, sometimes they were true and sometimes wrong and sometimes no alert at all when the price crossed down MA. May be it is because of the indicator I used.