stop loss

Hi
How about getting your stop-loss to fire when the current best lay price is x ticks higher than your matched back price
Selections lay price is equal or greater than r_ticks(bm_backp, x)

Also bear in mind if there is a spread between back and lay prices this will fire based on the current best lay price. To prevent this use g_ticks(back_price, lay_price) is less than <your acceptable spread in ticks between current back and lay prices>
 
I would comment that a 1 tick stop-loss almost guarantees being stopped out

Hi
Not quite.
To summarise your objective in english:
stop loss to fire if current lay price is greater than 2 ticks against you
and only if there is no gap between current back and lay prices

Conditions:
selections back matched is greater than 0
selections back unmatched is equal to 0
selections lay price is greater than r_ticks(bm_backp,2)
selections trigger expression g_ticks(back_price,lay_price) is less than 2

that said, you have other options for stoploss:

the distribute loss action has a built-in option for stoploss ticks or percentage
settings, stoploss options, lets you set default stoploss options

please do read the Operators and Functions section of the manual to get a better understanding of how r_ticks and g_ticks works

It's good.You are trying and learning.