Yes..And? The Dow is a track of 30 companies. The NYSE is an exchange. What is the deal with the charts? Aren't some DOW components also on Nasdaq exchange, which is also a S&P index function?
Also, using single exchange volume is so 1980s. In case you hadn't noticed, NYSE only trades about 30% of its listings' volume. https://markets.cboe.com/us/equities/market_statistics/