(Bloomberg) -- Oil fell, deepening a weekly loss, on the impact from a stronger dollar and concerns that the global market will flip to a glut next year.

Brent dropped to near $72 a barrel and was down by more than 2% this week, while West Texas Intermediate was around $68. The International Energy Agency said on Thursday it expects a surplus next year as demand growth in China slows while output swells. The glut would be even bigger if OPEC+ pressed on with plans to revive halted production, it said.

In China, data released Friday showed some encouraging signs for the economy, indicating Beijing’s latest round of stimulus has boosted a number of sectors. Apparent oil demand, however, declined in October from a year ago.

“While there are some positive signs in the broader data, clearly we are not out of the woods yet,” said Warren Patterson, head of commodities strategy for ING Groep NV, referring to the Chinese economic figures. “Industrial production was weaker than expected; oil-specific numbers were also not great with both refinery activity and implied demand weaker.”

Commodities including crude have struggled this week as a gauge of the dollar rallied to the highest in two years, powering upward in the aftermath of Donald Trump’s election victory. The US currency is set for its seventh weekly gain, making raw materials more expensive for most buyers.

Crude has been alternating between weekly gains and losses since mid-October, buffeted by tensions in the Middle East, the prospect of oversupply going into next year, and shifts in currency markets.

Elsewhere, US oil stockpiles rose by about 2.1 million barrels last week, above an industry estimate, There was also a major, 4.4-million-barrel gasoline draw, which cut holdings to the lowest in a decade for this time of the year.

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