The Arbitrager panel allow to do market making or take advantage of a price difference between two markets.
To open the Arbitrager panel select Tools > Arbitrager.

Using MarketMaker mode .Net Station can take rates from liquid exchange for some cashflow and quote the rates for some market with poor liquidity.
To start follow next steps:
When new quote comes from Source data, software will automatically create (modified) pending order on Destination market with the price taken from Source plus your discount. If pending order executed, software will automatically do a reversed trade on the liquid exchange.
Click Stop to stop Arbitrager panel work.
Using Arbitrager mode .Net Station can compare Level1 quotes from sources and make simultaneous trades in case of positive difference.
When new quote comes, software will automatically create trades if difference between Ask and Bid on different markets will be equal or exceed Min Difference. The amount for trade operation will be taken Max Amount field.