Push a button harder, watch the chart more closely, add a third indicator, and it feels as though the position is being steered. None of it changes what price does next.
The illusion grows with involvement. Manually managing a position minute by minute feels more controlled than a resting stop-loss, though the resting stop usually produces the better result. Watching an open trade also makes you far more likely to touch it.
You do control entry, size, stop, exit rules, and whether you trade at all. You do not control the outcome of any single trade. Separating the two lists is most of trading psychology, and it is why process-over-outcome is worth more than another indicator.
Related: process-over-outcome