Do you guys change Basic Strategy at all when counting?

I know that Basic Strategy is the foundation of playing good blackjack, but I was just wonderin how much do you guys vary it when the count gets really high or low. For example, if the count is positive and you have say a 15 versus a dealer 7, normally basic strategy tells you to hit, but since the deck is rich in tens do you stand instead? I guess my question is how much do you guys vary basic strategy with the count, or do you mostly just vary your betting and stick with basic strategy for the most part? Sorry if this sounds like a dumb question, but I am new to card counting. Any help would be appreciated.

Technically, "Basic Strategy" stays the same for any given game that has a set of rules that remain constant. However, our play decisions do change as the count rises above or below zero based on a set of "Indices" or "Index numbers" while staying matematically correct and perfect. Every count strategy has a set of Index plays that vary from its Basic Strategy. One that is most widely used is called the Illustrious 18. The Ill 18 is one that many here will concur is important for you to memorize.

If you tell us what count you are or will be using, we can give you some direction on where to find Index play info pertaining to the count you have chosen.

http://www.bjmath.com/bjmath/tcindex/i18index.htm

Learning departures from basic strategy is an important thing to do. A couple of posters have mentioned the Illustrious 18, and that is a great place to begin or end if you so desire.

One thing you should never do is use your intuitive sense to depart from basic strategy. For instance, in the example you gave, 15 v. 7, the count would have to be sky high (in Hi-Lo, it's +10 TC) to justify standing instead of hitting. But for 15 v. 10, it's an important index number, which would have you stand at +4. Some plays are worth learning and some are not. 15 v. 7 isn't worth much because it doesn't come up very often and when it does, the difference between standing and hitting is minimal.

That's where the Illustrious 18 comes in. It gives you the 18 most valuable strategy departures and covers about 80% of the gain you could get if you knew all the index numbers.

Look at the Simple Plus-Minus in Playing Blackjack as a Business.

Changes from basic strategy are "departures" or departure plays, meaning deparures from basic strategy. Revere'e above strategy for the single deck game is brilliant in its simplicity as departures are based soley on the algebraic sign of the Dubner High-Low Count. This was the first count strategy I learned & played.