Alcoa Corp (NYSE:AA) stock is in rally mode ahead of its first-quarter earnings report, which is due out after the market close on Wednesday, April 17. The security is up 5.1% at $36.98 at last check, after both the U.S. and Britain banned the Chicago Mercantile Exchange (CME) and London Metal Exchange (LME) from accepting new Russian aluminum and nickel.While the $38 region has capped price action this month, the 20-day moving average has been a solid source of support since early March, and could remerge ...