Question on position sizing for long-term holds vs. swing trades

Hey everyone, trying to get a better handle on my risk management. I've been journaling my trades, but I'm finding it hard to consistently apply a sizing strategy that feels right for both my swing trades ($SPX, $NDX) and longer-term positions ($GOOG, $MSFT). For swings, I'm trying to stick to a fixed percentage of capital per trade, but for my core positions, where I might scale in or out over weeks/months, that same logic feels a bit clunky. How do you guys typically differentiate your position sizing between short-term tactical plays and longer-term, more strategic holdings to ensure you're not overexposed or under-allocated to good opportunities?