There are two different streaks Synergy tracks. The first is a shooting streak (cold/cool/normal/warm/hot). This looks at what is 'normal' for the player and then looks at their shooting over the last few games to decide what streak they should have. We tweak their shooting rating based on what their streak currently is.
The other streak is 'impact', which measures overall play. This is for examples like if Camby pulls down 20 boards and 5 blocks for a few games, we boost his overall ratings a little bit.