By Bret Kenwell There are two separate setups for investors interested in Target and Walmart. Retail stocks lately have been quite strong — not quite to the level that we’ve seen out of energy, but certain stocks in this group have been pretty impressive. Specifically, I’m talking about Walmart (WMT) – Get Walmart Inc. Report and Costco (COST) – Get Costco Wholesale Corporation Report. Despite marketwide volatility, both stocks have been roaring higher. They hit new highs on Thursday, as Costco led the way higher following its impressive March sales report. Walmart is doing its part by workin…