The GUERRILLA algo works differently depending on the Execution Style you select.
Normal and Passive modes: This tactic works orders without displaying bids or offers. When liquidity materializes, it seeks to aggressively participate in the flow. If liquidity is poor, the order may not complete.
Aggressive mode: This will hit bids/take offers in an intelligent way based on a fair price model. It never posts bids or offers.
To use CSFB algos, select CSFBALGO as the destination on the Basic tab.