How do you decide if a stock is good for swing trading vs long-term holding?

Genuine question. I keep seeing stocks where the chart looks great (RSI bouncing, MACD crossover) but the fundamentals are deteriorating (debt increasing, cash flow declining).

Do you just pick one lens and ignore the other? Or is there a systematic way to evaluate the same stock from both perspectives?

Struggling with this especially for NIFTY mid-cap stocks where momentum and fundamentals often disagree.