How is “stamina” consumed? During what gameplay mechanics is it used? How is stamina recovered? This will determine the best way to go about solving your problem. Unless you have some odd mechanics where stamina is almost continuously changing during gameplay with no significant “downtime” where the value would be at 100% for example…i would avoid tick or binding events to update the bar as it will be doing an unnecessary amount of checks for no reason. I am a fan of the timeline because it can be used like a tick but also has other options to customize and more importantly it can be shut off when it’s not needed. So a little more explanation of your mechanics would be helpful in solving this.