and we're not in the Art Business...
nobody has proper balance..., however, if you can walk, and chew gun and sing, then, its a fair bet that you can handle 3 or more simultaneous positions.
ok, enough of the flat line humor,,,
the ability to handle multiple positions, simultaneously is in direct proportion to these factors:
1) your underlying confidence in the software platform, inclusive of dataline speeds (T1 or better)
2) the nearness of the chart (small format) to the Level I / II order entry box (inclusive of some analytical option; such as MACD on chart) )
3) dual monitor screen size configuration, so that you minimize mouse movement
4) absolutely no distractions, not from emotional branch managers, traders sitting next to you, or a growling stomach, hungry for lunch
Cheers