MongoDB: when compress data, I want to get the block's data type to do more efficient compress algo?

Question

I want compress the data stored in column more efficient, because mydata is timeseries of stock or future price.
Most of them is similar, so I thought I could compress the price data(float, uint64, int) more efficient than zlib,like what infobright do.

Could any one tell me how to compress the column more efficient or could I get the blocks data type when I write the compress plug.