(Sorry for my bad english but I am german) I want to make a health system with health bar. Can you give me tutorials or BluePrint screenshots?
Health UE4 Documentation Tut: https://docs.unrealengine.com/latest/INT/Engine/UMG/QuickStart/2/
Give your Character Blueprint a variable float called Health.
Add node, EventOnAnyDamage or some other damage node, connect that to a SET of the Health variable. Make a subtract node and subtract GET health (-) Damage. Plug this into Set Health. That way, damage will be removed from your health and set that new value as health all inside your Character BP. The tut above will display that value on your HUD and it will update whenever Health is damaged.