Signs of strength slip into Bitcoin markets but altcoins are proving more interesting as the weekend draws to a close. Bitcoin (BTC) hit problems at $46,000 on Sept. 12 after a \u201cstrong bullish divergence\u201d on lower timeframes met with resistance.BTC\/USD 1-hour candle chart (Bitstamp). Source: TradingViewHigher lows creep in for BTC\/USDData from Cointelegraph Markets Pro and TradingView showed BTC\/USD reject sharply after hitting local highs of $46,280 on Bitstamp.The move continues a ranging weekend, over which the pair failed to recover from Friday\u2019s sell-off.$45,500 is an important level for Bitcoin in the form of its 50-day moving average, a level which on Sunday continued to hold as support.As noted by trader and analyst Rekt Capital, lower timeframes showed increasing strength on the day, with a \u201cstrong bullish divergence\u201d characterizing the 4-hour chart. At the time of writing, however, no new levels had entered as support.\u201cBitcoin formed a Lower Low on the 4-hour timeframe during the days spanning the 8th and 10th of September,\u201d he summarized. \u201cOver the course of the 10th and 12th of September however, $BTC formed a new Higher Low on the 4-hour timeframe.\u201dBTC\/USD 1-day candle chart (Bitstamp) with 50-day moving average. Source: TradingViewCointelegraph contributing analyst Micha\u00ebl van de Poppe was also on the lookout for a higher low construction.\u201cLooking at a higher low to be constructed at Bitcoin and then we're ready to go toward $50K,\u201d he said Saturday.Polkadot leads Sunday's altcoin movesAs Cointelegraph reported, expectations include a Bitcoin price dip to as low as $38,000 at worst, with September poised to be a month of rumination for the bull run continues.Related:\u00a0Bull flag breakout pushes Avalanche toward $80 as AVAX price hits another record highBitcoin\u2019s overall crypto market dominance continued to fall at the weekend, nearing 40% in what could prove to be a boon for altcoin performance.Signs of life were already present on major alts Sunday, with Polkadot (DOT) leading the top ten with 10% daily gains.DOT\/USD 1-day candle chart (Kraken). Source: TradingViewThe largest altcoin, Ether (ETH), was up 3.2% at $3,425, albeit still down 13% compared to its position last weekend.