In requards to Level 2 analysis, how can one tell when the price is in a downtrend or uptrend and where the points of reversal are. I have access to level 2 information but I cannot dicyfer when to sell and buy back in lower. I see walls being placed on the sell side but I also see a lot of buy's on the buyers side. Can someone explain how one can read level 2 information affectively.

Much appreciated for any suggestions