If you like to keep track and anaylse your trades, you might find the attached useful.
To use it, download the Betfair P&L spreadsheet (NOT the betting history) and save to your computer,
Press the update button and load your saved file You should see something similar to this:
Selecting a Track,RaceType or Distance bring up the details on the right hand side. At Salisbury I've traded 12 markets, and the details on the right show the breakdown of each one. You can see I've done 485 trades and made a handsome profit of 50p. I plan to retire sometime in the next 800 years.