Betting spread

Can anyone offer any good advice on what a good betting spread would be based on a true count(6 deck shoe).I have been playing mostly using a running count instead of true.I am now still using the Hi/Lo,but want to start converting to a true count for betting purposes. I know that big swings in betting patterns draw attention.Is there a certain negative true count when you should get out of the shoe.Sorry for the long post,just trying to get some good information.

Thanks,

MF13