The Addon BarTracker logs the changes of the health and mana/rage/energy bars, and logs them. After a fight, it draws a diagram. The newest versions also log combat text, and allow detailed analysis with a filter. It's movable (shift click) and resizable (alt click), and can show a tooltip with additional statistics. Some commands can be reached with the right click menu. More commands are available with the /bartracker slash command:

• /bartracker show [on|off]
• /bartracker scale <num>
• /bartracker timescale <num>, auto when 0
• /bartracker timeout <num>
• /bartracker combatlog [on|off]
• /bartracker load <numame>
• /bartracker store <numame>
• /bartracker list
• /bartracker delete <numame>
• /bartracker start
• /bartracker pause