How many different data inputs do you need?

How many different data inputs do you consider necessary to provide you with your informational edge, and ability to extract profits from the market?
Which are your favorite? Do you need many? Or do you rather use 2 or 3 to keep it simple for example ?

Examples of inputs could be:

• Price action/movement
• Volume on the x-axis
• Volume on the y-axis ( VP )
• Market Profile
• Breadth indicators
• Looking at leading stocks of your index ( if you trade index future)
• Looking at sectors ( index)
• Time (velocity)
• Orderflow
• Looking at higher timeframes ( compared to ‘normal’ timeframe)
• Looking at lower timeframes ( compared to ‘normal’ timeframe)
• Correlations with other instruments
• Trademanagement
• Other..