After a multi-year run of disappointing investors, the Global X Uranium ETF (NYSEArca: URA), which tracks uranium miners, started 2017 on fire. For the first couple of months of the year, URA looked as though it was legitimately snapping out of its lengthy slide, but much of URA’s good work has recently been undone.

In fact, the largest uranium ETF has tumbled nearly 20% since its first-quarter high, paring its year-to-date gain to 13% along the way. Worse yet, some traders and technical analysts see more downside coming for URA and uranium stocks.

Adding to the recent pressure on URA is that uranium prices continue tumbling. As is the case with other mining equities stocks and ETFs, rare are the occasions when these investments rise while the material they mine loses value. Some technicians view $15 as critical for URA. Unfortunately, the ETF recently violated that important price point.

“Interestingly, the importance of 15 points is not only visible in terms of URA’s chart structure it also has importance from a Fibonacci retracement point of view. According to InvestingHaven, Fibonacci retracments are certainly not a leading indicator, but it rather has a secondary importance (or even lower). In this case, however, the Fibonnaci retracement level has exactly the same outcome as our chart perspective. In other words, it is another confirmation, from a different angle, of the decisive value of 15 points in URA,” according to ETF Daily News.

Earlier this year, uranium prices saw temporary relief after U.S. and five other permanent United Nations Security Council members backed plans for Iran to receive a 116 metric tons of natural uranium, with a huge shipment of natural uranium from Russia.

Another ETF for accessing the nuclear trade is the VanEck Vectors Uranium+Nuclear Energy ETF (NYSEArca: NLR), which takes a broader approach, including exposure to large and more stable utilities.

“URA has fallen rather sharp in February and March. However, the decline is losing steam now. There is a probability that the decline stops at this point. Uranium mining bulls really want to see current no break below current price levels. Although uranium miners are still bullish at this point, as they are just 2 percent below 15 points, it is absolutely mandatory that the decline stops right here,” according to ETF Daily News.