OK here's a month by month breakdown of that system, in "bets" profit or loss, if you think of it as $1 on each then it's how much won or lost per month level staking this system, $1 on each, over the last two years. The months are combined, ie Jan 04 and Jan 05 totalled, etc:

Jan -39
Feb -19
Mar +107
Apr -21
May +98
June -40
July -26
Aug +31
Sep +108
Oct +2
Nov +134
Dec +83

Total = +417 over the 5800 odd bets.

I would have loved to have seen each month in profit. This hasn't happened. In fact, it's very volatile.

I'm not a big one on stats and trends etc, but given that this method is averaging about 240 bets a month and is overall showing nice profit, is it odd that it is so volatile month to month? It has won six of the months, and LOST six of the months. 50% of the months LOST.

Should I be concerned?