Premier Trade Results

I have been trying to decide how best to keep a record of the profitability of the advertised trades.  I don't think judging the success or failure by yield is appropriate as I won't always be risking the full stake and depending on in-play moves may actually add to it.  Going forward, I will instead monitor the growth of the trading bank and the initial stake will always be 5% of the bank.  I will start with a bank of £200 and the initial stake will be 5% of that until it either grows or reduces by £100.  My new stake will then be 5% of that new bank, i.e. £10 stakes until the bank hits either £100 or £300, at which point the stake will become £5 or £15 respectively.  In theory, this will allow me 30 full stake losses without a winning trade before going 'bust'.