I'm looking for site similar to http://www.betfair.com Some other similar sites are: www.ibetx.com www.tradesports.com www.betdaq.co.uk www.sportingoptions.com In brief they are a Person-to-Person betting sites and will allow users to bet on all types of sports and events all around the world. We would like the best parts of each of the betting exchange sites made into one easy and INTUITIVELY used site. All the functionality of those sites are need to be built into the site with some extras: 1. Way for people to enter their own markets like local sporting events etc. 2. To let the user place back and lay bets consistently around a given event. The user will set their preferred conditions and the software will run automatically, with no further human intervention, placing bets whenever the conditions they have specified are met. Like searching for prices that are dropping or rising. It could also be set up to back and lay consistently around a given price. Backing at 2.6 and then laying at 2.4, over and over again. The bet maybe placed automatically and instantly, and program moves on to look for its next opportunity. 3. The software will need to work with Betfair, SportingOptions and other exchange sites. Once program was setup it will constantly scan across different betting exchanges, and identify trading arbitrage opportunities to back with one exchange and lay with another. Once identified the trade it must calculate the bets for each exchange, this will have to take into account the varying commission levels on each site and the minimum amount offered to trade. Than present users with opportunities. For better understanding please see: http://www.zero-risk-arbitrage.com/ And http://www.welldonesoft.com/ 4. Allow the user to lay bets at a predetermined time. 5. We will also need a section which calculates the profit and loss of bets placed or laid, enabling users to see their profit or loss potential before the bet is placed. The user would be able to enter their own odds, and enter the bets they would like to make, the application would then tell them what their profit or loss potential would be. The user must be able to change the figures easily so they can see what effect those changes make. The user should also be able to name and store each set of calculations for later retrieval and further adjustment. 6. In addition to odds translation table offer users to see his odds in the way he prefers by changing his preferences on the page. If you have any questions please let me know.