A premature exit on Nas

ast night, when I intended to go long on Nasdaq (Nas), the market had already closed. Consequently, the first action I took this morning was to initiate a long position on Nasdaq. However, I found myself unable to maintain the position for a sufficient duration to capitalize fully on the upward swing.

Here are the reasons:

I am still not fully confident in my trading setup and intuition.
Trading Nasdaq requires substantial position sizes, and I couldn't partially take profit without opening larger positions.
I remain convinced that Nasdaq is in a strong uptrend, and tomorrow I will actively seek opportunities to initiate long positions once again.