Tanking below the CR....if you define tanking as 0.5c below,...

Tanking below the CR....if you define tanking as 0.5c below, then you need to join the Armoured Corps! Sounds like you are upset at buying at the current top, recently, and being surprised that a SP can drop. I don't like to give advice, but perhaps the market isn't for you, unless you are planning on adopting a trading mentality of buying and selling on short term movements.