Attendants pose with a bitcoin sign during the opening of Hong Kong's first bitcoin retail store. Reuters/Bobby Yip Bitcoin has held strong support and has its sights set on a test of the $3,000 level, according to Goldman Sachs.

In a note sent out to clients on Monday, Sheba Jafari, the head of technical strategy at the bank, updated her recent chart work on the cryptocurrency.

The $1,856 to $1,790 area "has the potential to act as strong support," Jafari wrote. "All in all, the balance of signals appear to be shifting to a more positive tone."

Jafari's latest note comes two weeks after she predicted the cryptocurrency was setting up for a big drop.



At the time of her call, bitcoin was trading near $2,550 a coin. She said that bitcoin was "still in a corrective 4th wave" that "shouldn't go much further than 1,857." It fell a bit further, putting in a low somewhere between $1,758 or $1,852 (depending on which data you use).



Jafari, however, always expected the gains would resume after the correction.



And that they have.

Bitcoin has gained more than 20% from its July 17 low, and currently trades near $2,285. As to how far bitcoin can go from here, Jafari expects another run at record highs. "The minimum target for an eventual Vth wave from current levels is 2,988; an extended 5th could reach ~ $3,691."

Bitcoin is up 140% in 2017. It put in a record high of about $3,000 on June 12.