Running a monthly review of your numbers

A monthly review is not a celebration or a wake. It is a check on whether the way you are betting is working, run often enough to catch a leak early but not so often that you react to noise. Do it too frequently and every losing week feels like a crisis. Do it never and you repeat the same mistake for a year.

The trap is that a month gives you enough data to feel confident and nowhere near enough to be right about most of it. The whole discipline is separating the handful of numbers you can trust from the many you cannot.

Start with the numbers that aggregate everything, because those have the most bets behind them. Overall ROI, which is profit divided by total staked. Overall CLV, the average gap between the prices you took and where the market closed. Total turnover, so you know whether your stakes are drifting up in bad months. These three, taken across all your betting, are the ones with enough sample to say something after a single month.

Then look at the cuts, per sport, per market, per bookmaker, but look at them knowing most of them are too thin to trust yet. Note them. Do not act on them.

Here is the intuition. Betting outcomes swing wildly in the short run because of variance; that is the whole reason an edge takes so long to show. Your per-sport profit on fifteen bets is dominated by whether two or three of them happened to land. It is noise wearing the costume of a result. Your overall CLV across two hundred bets barely moves for luck, because CLV is measured at the point you bet, before the result exists. It is the earliest thing to become trustworthy.

So profit-based cuts need large samples to mean anything, and CLV-based cuts start meaning something far sooner. This is why CLV is the number to lean on in a monthly review: it stabilises while profit is still bouncing around.

The numbers in that table are rules of thumb, not thresholds; the point is the ordering. CLV firms up first, profit-based cuts need many times more bets, and strike rate is not a standalone signal at any sample.

A leak is not a losing month. A leak is one part of your betting bleeding consistently, month after month, in a way that overall profit hides. The way you find it is by looking for the same negative cut showing up repeatedly, not once.

The honest tell is negative CLV in a specific market that persists. If your football over/under bets show a steadily worse closing line while your other markets hold their own, that is a market where you are behind the price, not just unlucky. It reappears every month because it is structural, not variance. One month of it is noise; three months of the same sign is a leak.

The review fails the moment it becomes an overreaction. A losing month tempts you to rip up your staking, drop three sports and double your best one. That is trading a small real problem for a large invented one, and it destroys the consistency you need to read next month cleanly.

Pick one or two concrete changes and nothing more. If a market shows persistent negative CLV, stop betting it or bet it smaller and watch. If your late bets lag your early ones, bet earlier. If your stakes crept up in a losing stretch, reset them to a fixed fraction and hold. One change, given a month to show an effect, teaches you something. Five changes at once teach you nothing, because you will never know which one moved the number.

A good review is boring on purpose. Most months it confirms you are doing roughly the right thing and asks you to change almost nothing. That is the correct outcome far more often than a dramatic overhaul.