Wyckoff trading method, page-989

A further lack of volume and Spread, may indicate a weakening of demand.
If volume was average or a little below average, and spread remained about average or wider than average, I wouldn't be too concerned, unless it was ongoing low volume or very low volume.

On the WOW chart, there was some decent weakness above the current price, so it will be interesting to see if that has now been removed or absorbed, or if it will appear again as price rises towards it.

cheers