Also referred to as liquidity mirroring or exchange remarketing. In this strategy, Hummingbot makes markets (creates buy and sell orders) on smaller or less liquid exchanges and does the opposite, back-to-back transaction for any filled trades on a more liquid exchange.

The diagrams below illustrate how cross exchange market making works. The transaction involves two exchanges, a taker exchange and a maker exchange. Hummingbot uses the market levels available on the taker exchange to create bid and ask orders (act as a market maker) on the maker exchange (Figure 1).

Figure 1: Hummingbot acts as market maker on maker exchange

Buy order: Hummingbot can sell the asset on the taker exchange for 99 (the best bid available); therefore, it places a buy order on the maker exchange at a lower value of 98.

Sell order: Hummingbot can buy the asset on the taker exchange for 101 (the best ask available), and therefore makes a sell order on the maker exchange for a higher price of 102.

Figure 2: Hummingbot fills an order on the maker exchanges and hedges on the taker exchange

If a buyer (Buyer D) fills Hummingbot's sell order on the maker exchange (Figure 2 ❶), Hummingbot immediately buys the asset on the taker exchange (Figure 2 ❷).

The end result: Hummingbot has sold the same asset at $102 (❶) and purchased it for $101 (❷), for a profit of $1.