See my post attached here for why the oil rally is unsustainable.
Why is RTS unsustainable?
Firstly, it is likely to follow oil's possible move down.
Secondly, Russia is still in quite a severe recession.
Thirdly, Russia's economy is forecast to contract 1.5% this year.
As long as the outlook for oil looks poor (as it does in my opinion), then the Russian equity index shouldn't be making rallies of 30%.
The market has hit a strong level of resistance, as indicated by the upper horizontal black line.