Can someone explain how they get 2.5% profit out of this example?
This powerful feature makes it easy to trade both sides of a game and to adjust your odds on the fly. To activate MarketMaker, simply click the MarketMaker link and select either side of a blue best-odds box. Enter your base value (say +100) for the top runner along with your desired vig, and MarketMaker will create offers for both sides of the market.
In this example, MarketMaker will enter a request for Boston -7.5 at odds of +106 and another for Sacramento +7.5 at +106. (Remember, these offers will appear in the market at -106 by -106, so that other people can match up against your requests.) If you get balanced action on these offers, you will lock in a profit of 2.5%, equal to your selected vig.
This powerful feature makes it easy to trade both sides of a game and to adjust your odds on the fly. To activate MarketMaker, simply click the MarketMaker link and select either side of a blue best-odds box. Enter your base value (say +100) for the top runner along with your desired vig, and MarketMaker will create offers for both sides of the market.