February SPI Trading Performance

I made AUD 589 trading ASX 200 futures and CFDs in February. I have now compared my trades to the trades the algorithm specifies. If I had traded one whole SPI contract (rather than varying numbers of Plus500 contracts I would have made AUD 770. But the algorithm just daytrading would have made AUD 4,275. Overnight trading as well had a very negative return for the month (AUD -3,125 if you took an overnight trade every time you were up for the day). So, when I started doing overnight trades, it detracted from my performance. I can also calculate the "slippage". I lost an average of AUD 57 per day due to the spread between buy and sell and inaccuracy in getting in and out of trades at exactly the right time. This is actually less than the spread between buy and sell prices on Plus500 of 3 points or AUD 75. After accounting for slippage, the daytrading only algorithm would have gained AUD 3,062.