Build a Session VWAP and OBV From 00:00 UTC

A bar has high 52, low 44 and close 45. What is its typical price?

• 45, the close
• 47
• 48, halfway between high and low

OBV reads −40,000 on one chart and +12,000 on another for the same coin and hour. What is the most likely reason?

• One chart has the volume wrong
• The two charts started counting OBV at different points
• One chart uses closes and the other uses opens