About this Chart

There are two interpretations of volume, as defined below.

• Spot Volume: The dollar value of contracts traded each day. For example, if a user buys 10 contracts at $0.50, then the spot volume will be $5.

• Notional Volume: The number of contracts traded each day. For example, if a user buys 10 contracts at $0.50, then the notional volume will be $10.