Another idea (seeking feedback) is to use SPY, QQQ, and DIA as proxies for overall market performance since the indicators for the SPX, IXIC, and DJI don’t include volume information. I added a section in the spreadsheet above and substituted SPY, QQQ and DIA. With this, you can view a composite of those three ETF’s and use things like MACD.
Try:
amex:SPY*3.795+NASDAQ:QQQ*2.065+AMEX:DIA
I realize the volume of these ETF’s doesn’t mirror overall volume, but it may still be useful.