It might be an ending of the correction WXY. In January it would be a new sanction from USA. This should lead to fall of rubble. Also in 18 of March it would be presidents election in Russia so the government will try to suppress rubble before the election. But after it will continue to fall very likely.
The problem of the strategy is that it is expensive to hold position against rubble. Swap is huge. So use swap-free account before entering the trade.