When considering volume, you should continually refer to the following guidelines -

Increasing volume reflects increasing investor interest in that company.
Increasing volume that pushes up the price indicates an uptrend.
Steady volume on a share price that is trending up typically means that the trend will continue.
Decreasing volume on an uptrend can signal a potential reversal in the trend.
Increasing volume on a downtrend indicates a downtrend.
Decreasing volume on a downtrend can signal a potential reversal in the trend.

Shown here in the red rectangle isincreasing volume during which the stock rose by about 20%. Accordingly the stochastic rose up through the upper marker, the MACD was positive as was the OPI. The price then hit an upper resistance level and the volume of shares traded declined.