Brawler's Guild Helper (BGH) is intended to help you earn Brawler's Gold and the "Educater Guesser" and "You Are Not The Contents Of Your Wallet" achievements.
BGH will show you a countdown bar from the moment bets can be placed to the moment bets will not be taken any more (around 17 seconds). You can use this countdown to time your bet to the last couple of seconds so you can see how the hero is handling the early fight before making your decision!
BGH will also show you how many other players in the Brawler's Guild are betting on the Hero, betting on the Monster, or not betting. You may choose to use this information to influence your bet as well! Unfortunately the API cannot determine how players outside of your party/raid are betting, so you'll either need to form a group with others in the Brawler's Guild or you'll have to move your mouse around to mouse over players as they are placing their bets.
Finally, if/when Blizzard introduces the Brawler's Guild statisticians back into the game, BGH will also show you the win/loss ratio for each monster, giving you further insight that may help in placing your bets.
BGH currently only works for english language clients, but if enough interest is shown I will work on internationalizing the addon.
Options can be accessed via /bgh or the Interface Options menu.
By default, the betting window will be automatically hidden when you enter combat. You can also manually show or hide the betting window via "/bgh hide" and "/bgh show"