Mumbai, Jan. 13 -- The Indian rupee edged lower in opening trades on Tuesday in line with sustained weakness in equities. Moreover, volatile geopolitical situation is keeping the domestic currency under pressure. INR opened at Rs 90.24 per dollar and fell to a low of 90.27 so far during the day. Yesterday, rupee recovered from low levels and settled 2 paise higher at 90.16 against the US dollar on weak American currency and sliding crude oil prices. Equity market sentiment also improved after the new US envoy to India, Sergio Gor, said that both sides are actively engaged in firming up a trade deal. After opening weak and languishing in negative territory till about an hour past noon, Indian shares recovered and moved above the flat line ...