Oil nearing solar investment threshold?

Time to take some solar profits?

Mad Money's Jim Cramer has been hot at picking a few solar stocks this past year, but it hasn't been hard to win big in solar with oil prices skyrocketing higher. For now, however, it seems the high has been hit, and until a hurricane builds in the Gulf, prices will probably hedge lower. Lately, Cramer has put the solar/oil threshold at $120. With oil above $120, solar will still be a great investment. Below $120, watch out. I'll be talking more about this later, but wind power, Cramer believes, will still be a great green investment, even with oil well below $120.