RollMeter is an addon that displays your Monk's Roll/Chi Torpedo cooldown as a sort of "endurance" bar that fills and depletes. In the default UI implementation, the Roll ability icon lights up as soon as you have one charge available, but it can be hard to see the "spark" that shows the status of your second or third Roll cooldown. RollMeter aims to make it easy to quickly determine how many charges of Roll you have available right now, and how soon until you gain another charge.
How do I use it?
RollMeter comes configured right out of the box doesn't require any setup before you can begin rolling away. It'll detect how many charges of Roll/Chi Torpedo you have based on whether or not you have the Celerity talent, and it will segment the meter appropriately. You can move the meter by clicking and dragging it. But if you want to get your hands dirty with more options...
How do I configure it?
RollMeter's appearance is highly customizable. To display the Configuration UI, simply type /rollmeter or /rm. From there, you can change many aspects of RollMeter's appearance including size, transparency, color, bar texture, border texture and size size, and segment separator size and color. You can also change the orientation of the bar to make it fill horizontally or vertically. Using these settings, it's possible to make the bar match almost any UI setup!
RollMeter uses LibSharedMedia to share bar and border textures with other addons. If you haven't already done so, you should install the SharedMedia addon to gain access to more textures for the bar and border.