The 5 Card Rule, also known as the House Edge Rule or the Martingale Rule, is a betting strategy that states that it is advantageous to hold five cards rather than four cards in a blackjack hand. The rationale behind this strategy is that if the player holds four cards, the chances of hitting a higher valued card (e.g. a 10 or an Ace) are relatively low, while if the player holds five cards, the chances of hitting a higher valued card are much greater. Advocates of this strategy believe that it provides an advantage over playing without the 5 Card Rule and is therefore worth adopting in certain situations. However, there is some debate over whether or not the 5 Card Rule actually provides an advantage in blackjack and whether or not it should be used by all players.
Some experts believe that the 5 Card Rule does not provide an advantage over playing without it and is only worth adopting in situations where it would otherwise be disadvantageous to hold four cards (e.g. when there are several high-value cards in the deck). Others argue that even if the 5 Card Rule does not provide an advantage over playing without it, it should still be used by some players as it provides a psychological edge over opponents who do not use the rule. In conclusion, while there is some debate over whether or not the 5 Card Rule provides an advantage in blackjack, most experts agree that it should be used by some players in certain situations.
