[Suggestion] Indicator of getting hit

[extrapayah]

With increasing number of almost 1 HKO damage, and added cooldown to potions (i believe delay was added between consecutive use, compared to when i'm first time playing AL), i'd like to have certain indicator (as an option) of getting hit, so i can quickly use the potion,

or an option to increase sensitivity of critical condition
e.g. user can set at what percentage of health the screen start glowing red

thank you very much