Mechanical swingtraders: How many different tickers do you use to trade your target ticker?

For example, let's say my target ticker is INTC.

Before I buy INTC, I also require:

\- SPY to be in an uptrend (overall market)

\- SMH to be in an uptrend (semiconductor sector)

So my entry depends on three tickers, not just one.

For those of you with mechanical or systematic swing trading strategies:

How many different tickers influence your entry decisions?

Do you only look at the target ticker, or do you also require confirmation from the market, sector, industry, VIX, breadth indicators, or other assets?

Which tickers have you found add the most value?