(Now I’m not going to go into a line-by-line list of what’s wrong or not, but the last rule… better no comment…)
Really disgusting, to be thrown in the trash.
Put back the default ones that are more than enough for you.
http://forum.mikrotik.com/t/buying-rb1100ahx4-dude-edition-questions-about-firewall/148996/4
Unless you are an ISP, and pretending VERY hard that the rules are fine,
in case of an attack after a few minutes the router memory is exhausted and it crashes or reboots the router.
This is what you get from “your” rules, besides obviously making (as indicated in the previous post) your own router a means to create DDoS attacks.
Reset the defaults, and unless you know what you are doing, stay still.