diff --git a/lorahandler.go b/lorahandler.go
index a9d219e..0c3ab17 100644
--- a/lorahandler.go
+++ b/lorahandler.go
@@ -231,7 +231,7 @@ func DecodePayload(s string, deveui string, devaddr string, lrrlat float32, lrrl
 				multiply_by_2 = true
 			}
 			w32 = int32(((float64(pl_128.W1-w1_0_real) / float64(pl_128.W1_C)) + (float64(pl_128.W2-w2_0_real) / float64(pl_128.W2_C))) / 5.0)
-			if (multiply_by_2) {
+			if multiply_by_2 {
 				w32 = w32 * 2
 			}
 			if w32 < 0 {
@@ -278,6 +278,11 @@ func DecodePayload(s string, deveui string, devaddr string, lrrlat float32, lrrl
 	}
 }
 
+func IsDayTime() bool {
+	hours, _, _ := time.Now().Clock()
+	return ((hours >= 6) && (hours <= 22))
+}
+
 func WriteDatapoint(mytime int64, deveui string, devaddr string, v uint8, h uint8, p uint8, w uint16, w1 int32, w2 int32, t int16, lrrlat float32, lrrlon float32, fw_version int32, w1_0 int32, w2_0 int32, w1_c float32, w2_c float32) {
 	// wir nehmen humidity als Referenz, wenn diese > 0 ist, dann ist es
 	// eine gueltige Messung
@@ -307,7 +312,7 @@ func WriteDatapoint(mytime int64, deveui string, devaddr string, v uint8, h uint
 		w_gram := uint32(w) * 5
 		addValue(deveui, w_gram)
 		w_loss := getMaxValue(deveui) - w_gram
-		if w_loss > 500 {
+		if w_loss > 750 && IsDayTime() {
 			// Schwarmalarm!
 			alertLogMap[deveui] = fmt.Sprintf("alert,deveui=%s reason=\"swarmalarm\",w=%di,w_loss=%di %d\n", deveui, w_gram, w_loss, mytime*60*1000*1000*1000)
 			location, _ := time.LoadLocation("Europe/Zurich")