One quick note: someone asked me how to use the long/short ratio, so I'll use $ON as an example:
The platform-wide account long/short ratio is 0.95, meaning 48.6% are long and 51.4% are short.
A ratio above 1 means a higher proportion are going long; below 1 means more are going short. But remember: the more one-sided the ratio, the more wary you should be of a move in the opposite direction.