Boosted by Bitcoin's 6% gain, altcoins such as Polkadot (DOT), Near Protocol (NEAR) and Uniswap (UNI) remained stable after leading the gains.DOT is up 34% above $1.60 and is testing the key descending trend line at $1.75.NEAR is back at $1.00 after rising 21% and now faces resistance at its 50-day moving average near $1.25.UNI is holding on to its rebound momentum as it hovers above $4.00, but its gains are capped by its 50-day moving average at $4.18.Technical indicators for all three cryptocurrencies show that they are gaining momentum amid an overall downward trend.