GMGN is a real multi-chain meme-coin trading terminal (Solana + EVM chains), so I'll answer from general knowledge of how it works and drop its card below.
How GMGN surfaces momentum — it's built around real-time flow data, not just price:
Trending / New Pairs boards — the default views rank tokens by recent volume, holder growth, and price action. Momentum there means acceleration in buy flow (rising volume + rising holder count), not just a green candle.
Smart Money tracking — the biggest edge GMGN gives you. You follow specific "smart" wallets (early buyers who've been right repeatedly) and watch when they buy a token — early inflow from known profitable wallets is treated as a momentum signal ahead of the crowd.
Top Buyers / holder distribution — shows whether the buys are concentrated in a few whale wallets or spread out. Organic momentum usually looks like broad distribution; heavy concentration is a warning that one wallet can dump.
Price-action columns — you can filter the board by 1m/5m/15m/1h/24h change and volume. Momentum in a meme context is often measured in minutes — a coin pumping on the 1m/5m timeframe with rising volume gets flagged before longer timeframes catch up.
Dev & bundler flags — GMGN marks dev holdings and bundled-supply launches. A token where the dev still holds a huge unlocked bag is momentum against you even if the chart looks hot.
The honest caveat: momentum detection on GMGN is a screening tool, not a signal to buy. Meme-coin "momentum" is extremely short-lived, thin-liquidity, and heavily gamed by devs and snipers — a token that looks like it's moving is frequently a setup for distribution. Treat fast price/volume acceleration as a risk flag to investigate (who's holding, is liquidity locked, is the dev a sniper), not as a recommendation. This isn't financial advice — do your own diligence on any token before trading it.