WTI has rallied more than 11 percent over the past month, raising hopes from oil bulls that maybe, just maybe, the price gains are here to stay. Oil had dipped in February and March on record high levels of oil sitting in U.S. storage, but by April, the market is starting to look tighter. The oil market bust is closing in on the three-year mark, and there are growing signs that things could finally be moving in the right direction, according to oilprice.com.

Despite the record high levels of crude oil storage in the U.S., inventories are falling pretty much everywhere else. South Africa, the Caribbean, Nigeria, and Iran are all reporting lower inventory figures, although the reasons vary. Iran cleared out its fleet of floating storage, which had built up during years of sanctions that prevented the Islamic Republic from exporting to its full potential. That backlog of oil has now been worked through and Iran could have trouble lifting exports. In fact, Iran’s exports have been flat since last summer.

Europe also has high levels of oil and refined products sitting in storage, but total levels are down from 2016. And like the U.S., the past few months have been quiet ones for refiners. That suggests that inventories should start seeing some more meaningful declines in the months ahead as refineries ramp up.

According to FGE, and reported on by Reuters, total product stocks across the U.S., the Amsterdam-Rotterdam-Antwerp region, plus Singapore and Japan, declined by a combined 6.5 million barrels – a sign of market tightening. Storage is still exceptionally high, but converging down towards long-run averages. Outside the U.S., accurate data is hard to come by, so these snippets offer some clues into broader market trends. “Across the first quarter of the year, crude stocks built by much less than they did in the first quarter of last year even though refinery maintenance globally was much heavier,” Energy Aspects analyst Richard Mallinson told Reuters.