Automation help:horse racing

[HRacing]

Hi all,
Firstly how good is betangel. Been addicted for a while now, not sure if that is a good thing but anyway been messing around with the automation feature on guardian and just need advice from someone who has used the feature successfully.
My current rules are:

For Horse Racing:

-Place a lay bet 1 tick below best market price then offset by 1 tick
- Green up 10 seconds before off

Very very basic i no but i am just wondering how to put a stop loss into this. This basic rule works well if the price drifts but it is a very different story if the price drops. When the lay bet is matched and the price drops there is no safety net, all i can really do is hope the price pops back out again. Any advice would be very welcome. Sorry if this question seems a bit brain dead to the pro's but suppose everyone started somewhere

Regards