The corrective rally in bitcoin (BTC) could gather momentum if key resistance above $6,500 is crossed on the back of high volumes, according to technical charts.

The leading cryptocurrency witnessed a symmetrical triangle breakout last week, opening doors for a stronger corrective rally towards $6,800–$7,000.

However, despite the bullish setup, BTC was rejected near $6,600 on Friday and spent the weekend trading in a sideways manner in the range of $6,350–$6,550. As a result, the immediate bullish outlook has been neutralized.

Further, trading volumes fell to a two-month low of $3.22 billion on Saturday, putting a question mark on the sustainability of the recovery from the recent lows near $6,100.

That said, the corrective move could resume if the cryptocurrency sees a high volume bullish break from the three-day long narrowing price range.

At press time, BTC is changing hands at $6,490 on Bitfinex – down 0.10 percent on a 24-hour basis.

As can be seen, BTC has charted a narrowing price range over the weekend. A break above $6,540 (triangle resistance) would signal a continuation of the rally from the Sept. 8 low of $6,119.

More importantly, it would strengthen the bullish case put forward by last week's bullish relative strength index (RSI) divergence and symmetrical triangle breakout.

On the other hand, a break below $6,380 (lower end of the narrowing price range) would signal an end of the corrective rally.

Over on the daily chart, the bullish crossover between the 5-day and 10-day moving averages (MA) indicates the path of least resistance in on the higher side. So, the cryptocurrency is more likely to extend the corrective rally in the short-run.

Disclosure: The author holds no cryptocurrency assets at the time of writing.

Bitcoin image via Shutterstock; Charts by Trading View