I feel like an amateur for not seeing this sooner

Oil is rebounding hitting 2016 highs. It's up 20% in April, which is when money started getting pulled out of lithium. And we're down 20% from our highs

Is the inverse relationship between the two that simple?

Any oil specialists here who might have an idea about this oil rally?

"Brent has now risen nearly 20 per cent in April, its largest one-month gain for the past 12 months."

http://www.theweek.co.uk/oil-price/60838/oil-price-dips-as-bp-announces-first-quarter-losses