Momentum trading would be a strategy and value stock would be a stock selling below its fair value.
I believe that investors can and have made boatloads of money by momentum trading value stocks.
I have recently been dabbling more and more with an approach which has a little hint of momentum bias where one would select a basket of seemingly attractive stocks. Harvest short term losses on the ones that don't work out and reinvest in other seemingly attractive stocks.
Don't double down on losers, ever.
Consider increasing positions on winners even when it means increasing your cost basis per share and even around all time highs, but only when the business fundamentals are strong and improving, and valuation remains reasonable or even improving.
Never Sell? Match gains to tax losses to reinvest in the next best ideas? Sell half the position when a stake doubles, and then let the rest ride for the long term?
The selling part is the hard part, and I've certainly left a lot of gains on the table by poor selling discipline or selling too soon. I've significantly improved my returns though by trying to feed the winners and weed the losers. I think very good long term returns will require adding to winners and holding.
Sometimes a stock that's beating the market continues to be a great investment. Sometimes a stock will bump against an all time high while the fundamental value keeps increasing. I've seen several of these situations before breakouts with long time compounders.