MP5 Tracker

A small mana bar overlay for Classic Era / Hardcore that shows exactly when your next mana tick lands, and how much longer you're stuck in the 5-second rule after casting.

What it does

Tick sweep — a glowing blue marker travels across your mana bar toward the next regen tick (roughly every 2 seconds), so you can time drinking, pulling, or a last cast around it instead of guessing.
5-second-rule indicator — cast a mana-costing spell and a red marker appears at the right edge of your mana bar, sliding left over the ~5 second window where Spirit-based regen is suppressed. The tick sweep freezes until it clears, then restarts cleanly.
Works as a standalone draggable bar, or as a direct overlay on top of your character frame's mana bar.

Usage

Open Escape → Interface → AddOns → MP5Tracker for the options panel:

Lock position — stop the bar from being dragged.
Overlay on mana bar — superimpose directly on the character frame's mana bar instead of floating free.
Reset position — snap back to the default standalone position.

Or use slash commands:

/mp5 lock       -- lock the bar in place
/mp5 unlock     -- unlock it so it can be dragged
/mp5 overlay    -- toggle overlay-on-manabar mode
/mp5 reset      -- reset position to default

Why this exists

Classic mana regen has two independent timers that are easy to lose track of mid-fight:

Mana ticks land on a fixed ~2 second cadence.
Casting a mana-costing spell suppresses Spirit-based regen for about 5 seconds (the "5 second rule") — MP5 stat from gear/talents keeps ticking through this, but your Spirit-based regen doesn't resume until it clears.

MP5 Tracker makes both of these visible at a glance instead of mentally counting seconds.