A ladder interface is nothing more than a particular view of the data which allows to place, modify and cancel trades very quickly, perfect for scalpers or spread traders and traders operating in very volatile markets, where prices change very quickly. Trading on Betfair is actually not much different from trading on the Stock Exchange. Laying and backing sporting events is just like buying and selling shares, and many techniques and strategies can be utilised in both the worlds.
The ladder interface is available on almost all Betfair trading apps and allows traders to place orders into Betfair quickly (one-click) and precisely and hence in a larger number and in a shorter time frame than you would normally do on the Betfair platform itself.