Moving Stop Loss

I came up with an entry plan.
I came up with a stop loss.
I came up with a target price.

My entry was matched.
My target price was hit at the end of the day.

I lost money.

Why??
I was too kiasu that I moved my SL to a tighter margin too early, a SL that's lower than the initial plan, but not a level that will make me break even.

Lesson learnt? Don't move your SL unless it's to break even level (protect profit), or to put a trailing stop. What good it has to change a SL from 50pips to 30pips? If I could afford 50pips, why reduce? If I think 50pips was a reasonable margin, why change?

It reads, fear.

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