On the weekly charts, Voltas is still pretty much in bearish territory with the stock yet to cross above the highs it made in 2012. All time highs made in 2007 / 08 and 2011 remain pretty far away for even consideration.
But its on the daily charts, that we see some substantial action indicative of a change in trend. The stock is placed just below its short term resistance and a move above 130 should give a clear breakout on the medium term charts as well. Above 130, 155 is the next level of resistance for the stock.