When The Hungarian Opera House has a new promo, a post appears on its page https://www.facebook.com/Operahaz/?ref=ts&fref=ts and the first 10-50 people who click and answer a simple question get free tickets, I mean real tickets worth about 20 USD. The problem is this quota is reached in minutes. The post contains a link to an app:
So, can I set up somehow an alert which notifies me when this post appear? Playing a sound, popping a message, sending an email, sms or any other way would be great.