How do I set a price threshold for alerts?
(See http://luzme.uservoice.com/knowledgebase/articles/308153-how-do-i-change-my-settings-
if you're not sure how to)
Click on 'My Stores'

You will see a list of countries and stores.
For each country, there is a 'Your Price Threshold' settings; enter the price threshold you want and press 'Save All'.

You will then only get email price alerts for prices below that threshold in that country.