Oftentimes at micro and small stakes, opponents only 4-bet the nuts like AA, KK etc. This means that when you start 4-betting, a lot of times players will overfold to your aggression.
A typical balanced 4-bet range at micro stakes may look something like AA, KK, A4s, A3s, A2s. These suited hands are actually very good 4-bet bluff candidates, because they block the Ax value hands that your opponent may be 3-betting with. However, your opponents would have to have an extremely tight 3-betting range for you to only be able to 4-bet this range.
If your opponent is 3-betting a standard amount, he will probably overfold if you widen your 4-betting range. Expand your 4-betting range to include other value hands and a few more bluffs, instead of playing the same narrow range as the rest of the population.
You have to ask yourself a couple questions in order to determine whether or not you should 4-bet lighter.
First, is your opponent going to call or 5-bet jam any worse hands than the one you have? If so you should definitely 4-bet! Second, is your opponent going to fold enough to make your 4-bet bluffs profitable? Typically population will overfold, but it’s important to take into account any stats you may have on your opponent.
It’s definitely important to not be too scared of 4-betting, you can capitalize on a ton of mistakes your opponents will be making when defending 4-bets. They will typically overfold, especially if their 3-betting range is decently wide anyway.
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