For the Plasma (2014) on Netflix

Plot summary

At a house on the coast of Maine, Helen has taken a job watching the surrounding woodland on closed-circuit cameras, a forest-fire lookout's routine. Going over the footage, she discovers that she can rework her own perception of what the cameras show, and that the change lets her forecast movements in global financial markets. Charlie, her friend, comes to the house to work with her, questioning and hard to satisfy. The two make financial predictions from the forest views, and Charlie has trouble finding meaning in the work. A lighthouse keeper and a pair of investors break into their isolation, and the partnership between the two women begins to come apart.