Best Index for TA??

What index is the most straight forward when it comes to moving the actual market?

For example.

Dow jones is the top 30 stocks of NYSE and NASDAQ

Should I just chart that ticker since its really based off the most important info?

I used the nasdaq instead of looking at actual SPY to trade SPY options.

For the inverse, should I use SQQQ for confluence since the market moves off tech?

Or should I just stick with VIX?

Am I doing something wrong ? Over complicating ?

I would love to hear your info.