individual files to run js from mongo

mongo-queries/group_ltc.js

@@ -0,0 +1,15 @@
+// group ltc trades by second, with volume-weigted price
+db.ltc_trades.aggregate([
+	{ $match: { timestamp: { $gt: 1440117467} } },	
+	{ $group: {
+		_id: "$timestamp",
+		total_price: { $sum: { $multiply: [ "$price", "$amount" ] } },
+		total_quantity: { $sum: "$amount" }
+	} },
+       	{ $project: {
+		price: { $divide: [ "$total_price", "$total_quantity" ] },
+		amount: "$total_quantity"
+	} },
+	{ $sort: {_id: 1} },
+	{ $out: "grouped_ltc_trades" }
+])