The Market Tide charting uses the SPY equity price as a proxy for how the market is performing.

The net call and put premium used in the Market Tide chart encompass tickers across the market, beyond that of the SPY ETF holdings.

The SPY Net Flow chart also uses the SPY equity price, but by default the net call and put premium values are ONLY for SPY options. 

A switch has been added to the SPY and QQQ Net Flow charts, allowing you to view the aggregated net call and put premiums for tickers being held by the aforementioned SPY and QQQ ETFs.