The very essence of technical analysis is to identify patterns that have an extremely high probably of repetition. It normally takes an advanced degree, possibly two, in mathematics and higher calculus/statistics to simplify these concepts.
However, with the expectation that candles on volume will show a high or even low, degree of repetition is a falicy not supported by the fundamental data that has been confirmed from so many market participants. Such comments as:
.."market maker participants are simply facilitating the order flow instead of handling signaling games",
.."we're having a deficit of buyers", or similar comments like: "we have a buyers strike".
Simply put, were volume reflective of a more natural demand/supply pattern than just happen-stance, as it is now, then one could interpret the candles on the volume as one would interpret the candles on the stock price movement.
OK, to make it more plain, should an order to sell 100,000 MSFT come into GS, they will do their thing, and handle the order, whether or not they complete it from within their own demand (inclusive of SLK and PropShops using SLK's Redi+, etc.) or will totally release it to the marketplace and become the Ax on MSFT. After that order has been filled, then there's no predictive pattern that suggests that a repetitive event of such magnitude will reoccur, or reoccur in a predictive manner.
Conclusion. Volume on candles or candles on volume will be deceptive, and just might cause you to trade on the tail end of almost every above average volume spike.
Careful....