A triple top is three attempts at roughly the same high, each rejected — essentially a double top with one more test, or a flat-topped range that finally fails. It shows a level that has held repeatedly, which makes the eventual break more significant precisely because so many traders were watching it.
Reading it
Each rejection that holds reinforces the level, but repeated tests also absorb the resting orders defending it — which is why the third or fourth test often breaks where the first held. A triple top frequently overlaps with a horizontal range; the difference is intent: you are watching for the failure of the ceiling, not trading the chop inside.
Confirmation and risk
As with double tops, the signal is the neckline break (the support shared by the troughs). A clean break on rising volume is the trigger; a quiet poke through is often a stop-hunt that snaps back. The shared level also gives a tight invalidation — if price reclaims it after the break, the pattern has failed.