[aaavl2821]

i think some firms buy analyses of imagery to predict oil market movements by looking at whether oil storage containers are empty or full. could probably imagine doing similar things in other commodities markets (corn etc)

[tigerBL00D]

Yes, but not necessarily to trade stocks. There is a more direct use of this data - to predict demand.

[aaavl2821]

not to trade stocks necessarily but to trade commodities