VWAP and the closing price are the most important thing for the primary dealers, bulge-bracket, prime brokers, investment banks, broker dealers, swaps dealers (they have many names).
They process client orders (size) and contractually guarantee fills at VWAP and/or closing for securities transactions (institutional money). If they beat VWAP and/or closing when executing on behalf of clients, they retain the difference.
The FCM BDs, and FCM BD SDs are making a market in VWAP/closing and speculators are the counterparty to the individual executions facilitating the fulfillment of those contractual obligations (guaranteed VWAP/CLOSING).
They will trade and compete for fills relative to VWAP/CLOSING and they manipulate the MKT, VWAP, AND the CLOSE.
You know the names.
Goldman, Morgan, Barclays, Merrill, Credit Suisse, BOFA, CITI, etc...
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The system looks like a primitive momentum type thing with crossovers and candles.
You can aggregate volumes in ThinkorSwim by combining tickers.
Examples: AAPL + MSFT, XLK - 3*XLF, 5*/YM - 50*/ES
It's nice to aggregate volumes, and calculate VWAP on stock and futures baskets, ratios of stocks, and synthetic portfolios and indexes using futures baskets and spreads.
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