There are multiple variants of the candy cane fence. In some levels, there are horizontal or vertical candy cane fences which take up one or more spaces. Sometimes, they are linked together to protect candies and blockers within their radius. There is also the candy cane space, composed of four candy cane fences linked together so they form a 1×1 square, like most blockers. The candy cane space is specifically designed to protect individual tiles on the board. An example is level 3256, where colour bombs are needed, but they are protected by candy cane spaces.
For the list of levels with this blocker, see here.
The candy cane fence appears between tiles, much like ingredient exits and teleporters.
The candy cane fence is indestructible.
It doesn't block special candy effects though unlike the liquorice swirl.
If a blocker is on one side of the candy cane fence, then matches on the other side will not affect.
They block candies from falling or sliding.
It is impossible to swap candies from one side of the candy cane fence to the other, even with a Free Switch.
All matches must involve candies on one side of the candy cane fence. Any match that involves candies on different sides of a candy cane fence is invalid, even if it would normally be valid. For example, you cannot match two purple candies on the right of the fence with one purple candy on the left side of the fence.
A Magic Mixer surrounded by candy cane fences can spawn blockers, this nature of candy cane fences was revealed in level 3394.
This blocker's main gimmick is to limit space on the board. Normally, once a blocker is destroyed, then something else occupies the space(s) left behind. However, if a blocker surrounded by candy cane fences is destroyed then the candy cane fences will prevent the space from being filled by anything else.
Furthermore, candy cane fences may be used to surround blockers so that they can only be destroyed by special candy effects.
Movable elements can be transported outside the radius of candy cane fences through teleporters and conveyor belts, as seen in level 3258 and other levels.