One of the betting signs you should consider before making a bet is the movement of the odds. This is true regardless of what sport you bet or with which bookie you do it. You should check the history of the odds offered by bookmakers like bet365, bet-at-home, William Hill and all the others.
This will give you more options to be profitable with your bets, because on one hand it will give you additional information about the match you are going to bet and on the other it will allow you to bet on higher rates and thus earn more money.
What kind of a signal is the movement of odds and how could we use it? Mostly it is a signal that the majority of the bettors prefer a certain outcome of the match. This is because the bookmakers, like the already mentioned bet365, bet-at-home, William Hill and all the others do their job which is to win, regardless of the outcome of the match. This is achieved by appropriate distribution of all bets on each possible outcome, so the losing bets to cover the losses which the bookmaker should pay as winnings.
So, when too many bets are placed for one or another outcome of a match, then the bookmaker immediately lowers the odds, by which the bookie invites players to avoid this outcome and begin betting on the other possible outcomes with now higher odds.
The latter suggests exactly what it takes to be successful in your betting. It is to try always betting with the highest possible odds. You have no use at all to bet on a match that is with odds of 2.1, when two days ago the proposed by the bookies odds were 2.3. This is a losing strategy that will bring you only losses in the long run, even if you manage to achieve some success from time to time.
So, always keep in mind the odds and their changes. This will help you to significantly increase your success when betting on sports events.