After listening to Korra's instructions, Chaikoka flows chakra into his doujutsu. He then carefully shifts his gaze to Korra's hand. Soon after, the hand seals are being performed with such speeds that Chaikoka's eyes could barely keep up. However, he concentrated with great ferocity in order to push his doujutsu to its limits. Horse.. Snake.. Ram... Monkey.. Boar.. Horse... Tiger..Ok good, you seem to have the basics of Chakra sight down, now for this next test, you will have no doubt already noticed that the Sharingan seems to slow motion down in your eyes, allowing you increased reactions, it allows you to discern the moves of your opponents, by breaking down the movement of there limbs sometimes with such effect it can seem like precognition.
Now your visual prowess has not yet reached this stage.
But with that in mind i want you to practice following the handseals i will be making, in doing so i wish you to deduce the exact technique i'm using.
Kind of like a game of guess who, but now it's guess jutsu.
Korra does the Horse → Tiger or Snake → Ram or Tiger → Monkey → Boar → Horse → Tiger signs and breathes out a fireball.
I believe you used, Fire Release: Great Fireball Technique, judging by the seals.