SR% = Success Rate % (e.g. an each-way bet that returns a profit is classed as a success even if the horse doesn't win the race).
BSP Profit = Total profit to 1 point level stakes based on Betfair Starting Prices.
POT% = Profit On Turnover (BSP Profit / Total Staked)
VBP = Variable Bet Profits based on Betfair SPs.
When betting on Betfair you'll need to take into account the commission they charge, between 2 - 5%. Enter a value to see the effect commission has on performance. The figures in the above table assume commission of 5%.