I know some people that do gamble on legs which they no knowledge about, what some of those people do is make use of the statistics which they see to make prediction, and sometimes they are always right, but also sometimes they are wrong.
I don’t really bet on sport or team which I have no knowledge about, whenever I decide to do that, things are not always working out for me, so I just focus on sport which I know I have proper knowledge about, and teams which I know have been following their matches for some time, and I know what they are capable of.