Database
[{"data":[[ISODate("2018-10-01T03:45:00.000Z"),752.5,752.9,746.5,746.5,],[ISODate("2018-10-02T03:46:00.000Z"),746.5,740.9,746.5,749.95,]]}]
Query
db.collection.find({"data":{"$elemMatch":{"$elemMatch":{"$gte":750}}}},{"data.$":1})