seller's remorse

Dear All Short termers,

I sold my parcel of BKN yesterday @ 4.47 based on the strong 3 days we had, the gap created and a doji that formed yesterday. Today I have seller's remorse I think I was too quick to sell after studying the chart this morning it appears that may be the upward potential in the short term is still up to 4.60 to 4.80 mark. Question how do I know if the gap is a continuation or a breakaway gap ? Do I visit the "crime scene" twice and admit to myself I made a mistake or is that greed talking now. I have to say upfront at the time of considering the trade it was not clear to me where about I should exit the trade apart from my stop loss.

Any views?