# Alert based on % fall

Very much a novice user of Optuma here, but am slowly getting an idea of how things work. I have a question regarding Alerts which I can’t find an answer to.

How do I create an Alert for a stock which has fallen 10% from it’s 12 month top? I’m not even sure to start as a Technical Alert or Price Alert. Can this be done, and can anyone assist?

Thanks.

Hi Bill,

Unless you are only tracking a handful of stocks, your best option is to set up a scan which can be run over the entire market or index. The following formula will show those stocks that are more than 10% from their 52 week high:

```// Calculate the 52 week high;
H1 = HIGHESTHIGH(BACKTYPE=Weeks, BARS=52, INCBAR=True);
//Is current close more than 10% away?
1-(CLOSE()/H1) > 0.1```

To only show those that have crossed above the 10% threshold run a scan on Last Bar and change the last line of the formula to

1-(CLOSE()/H1) CrossesAbove 0.1

See the video here on how to link the scan results to a watchlist, so opening the saved workbook will automatically run the scan and update the list with the latest results: