diff --git a/index.js b/index.js
index 3da8ad0..4de28c5 100644
--- a/index.js
+++ b/index.js
@@ -3,6 +3,8 @@ const axios = require("axios");
 const { createLogger, format, transports } = require("winston");
 const { combine, timestamp, printf } = format;
 
+const NIGHTSCOUT_TREND_ARROWS = require('./nightscoutTrendArrows');
+
 const logFormat = printf(({ level, message, timestamp }) => {
     return `${timestamp} [${level}]: ${message}`;
 });
@@ -155,6 +157,7 @@ async function uploadToNightscout(measurementData) {
         "type": "sgv",
         "dateString": measurementDate.toISOString(),
         "date": measurementDate.getTime(),
+        "direction": mapTrendArrow(glucoseMeasurement.TrendArrow),
         "sgv": glucoseMeasurement.Value
     });
 
@@ -185,6 +188,23 @@ async function uploadToNightscout(measurementData) {
     }
 }
 
+function mapTrendArrow(libreTrendArrowRaw) {
+	switch (libreTrendArrowRaw) {
+		case 1:
+			return NIGHTSCOUT_TREND_ARROWS.singleDown
+		case 2:
+			return NIGHTSCOUT_TREND_ARROWS.fortyFiveDown
+		case 3: 
+			return NIGHTSCOUT_TREND_ARROWS.flat
+		case 4:
+			return NIGHTSCOUT_TREND_ARROWS.fortyFiveUp
+		case 5:
+			return NIGHTSCOUT_TREND_ARROWS.singleUp
+		default:
+			return NIGHTSCOUT_TREND_ARROWS.notComputable
+	}
+}
+
 function deleteToken() {
     authTicket = {};
 }
diff --git a/nightscoutTrendArrows.js b/nightscoutTrendArrows.js
new file mode 100644
index 0000000..419e350
--- /dev/null
+++ b/nightscoutTrendArrows.js
@@ -0,0 +1,17 @@
+// According to https://github.com/nightscout/cgm-remote-monitor/blob/46418c7ff275ae80de457209c1686811e033b5dd/lib/plugins/direction.js#L5
+
+const NIGHTSCOUT_TREND_ARROWS = {
+	tripleUp: 'TripleUp',
+	doubleUp: 'DoubleUp',
+	singleUp: 'SingleUp',
+	fortyFiveUp: 'FortyFiveUp',
+	flat: 'Flat',
+	fortyFiveDown: 'FortyFiveDown',
+	singleDown: 'SingleDown',
+	tripleDown: 'TripleDown',
+	doubleDown: 'DoubleDown',
+	notComputable: 'NOT COMPUTABLE',
+	rateOutOfRange: 'RATE OUT OF RANGE'
+}
+
+module.exports = NIGHTSCOUT_TREND_ARROWS