Case Study 28 - In-play & selections

From Bet Angel forum:

Just another quick seek of your valuable help on Bet Angel. I have created an automation rule that is doing OK in testing. It's an 'in-play' automation and is for horse races. It's working as it should for UK races as they go in-play. However, am struggling with races outside of the UK.

What I'd like to ask, is if there is a way to know if market offers in-play, perhaps an icon I am missing either on Bet Angel or the exchange website. Knowing where I can use the automation will be of great help in its refinement.

Also, can someone confirm the correct option so that the rule will only apply to races of 5 horses or more?