From 04a7c7a2cc3c70813fd3f522784d7ca7fbea1bd5 Mon Sep 17 00:00:00 2001
From: c9s <yoan@maicoin.com>
Date: Tue, 10 Nov 2020 16:55:35 +0800
Subject: [PATCH] add stddev accessor

---
 pkg/indicator/boll.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkg/indicator/boll.go b/pkg/indicator/boll.go
index b0692ddd1..3fa5719c8 100644
--- a/pkg/indicator/boll.go
+++ b/pkg/indicator/boll.go
@@ -54,6 +54,14 @@ func (inc *BOLL) LastDownBand() float64 {
 	return inc.DownBand[len(inc.DownBand)-1]
 }
 
+func (inc *BOLL) LastStdDev() float64 {
+	if len(inc.StdDev) == 0 {
+		return 0.0
+	}
+
+	return inc.StdDev[len(inc.StdDev)-1]
+}
+
 func (inc *BOLL) LastSMA() float64 {
 	return inc.SMA[len(inc.SMA)-1]
 }