First of all you should understand that Tibia have 16 status bits. Each bit can be 0 or 1. If you have that status then the value is 1, else the value is 0
If you don't have any special status then the status bits array would be 0000000000000000
How to check a single bit?
$statusbit:x$
How to check first bit?
$statusbit:1$
How to check second bit?
$statusbit:2$
...
How to check the last bit?
$statusbit:16$

Now... the meaning of each bit:

bit 1 = You may not logout during a fight
bit 2 = You are hasted
bit 3 = You are paralysed
bit 4 = You are protected by a magic shield
bit 5 = You are drunk
bit 6 = You are electrified
bit 7 = You are burning
bit 8 = You are poisoned
bit 9 = You are bleeding
bit 10 = You are in protection zone
bit 11 = You may not logout or enter a protection zone
bit 12 = You are strengthened
bit 13 = You are cursed
bit 14 = You are dazzled
bit 15 = You are freezing
bit 16 = You are drowning

Note: This guide is valid since Tibia 7.73. Older versions only have bits 1-8 and bits have a different meaning there.

Example of use:

How to cure paralyze with exure whenever you get paralyzed:
cond1: $statusbit:3$
operator: #number=#
cond2: 1
action: exura
delay action: 400
do not execute again: 1000

Here you can see the settings: