Toi-Gye is the pen name of the noted scholar Yi Hwang (16th century), an authority on neo- Confucianism.
The 37 movements of the pattern refer to his birthplace on 37 latitude, the diagram represents "scholar".
Grade - Blue Belt with Red Tag / 3rd Kup
Movements - 37
Ready Posture - Closed Ready Stance B / Moa Junbi Sogi B