From 5f2f4b0ab1fd2231cee7deb4532c46ba28f0700e Mon Sep 17 00:00:00 2001
From: Benny Neugebauer <bn@bennyn.de>
Date: Mon, 27 Dec 2021 22:59:25 +0100
Subject: [PATCH] fix(ADX,BBW,STOCH): Process zeros

---
 src/ADX/ADX.ts                 | 2 +-
 src/BBW/BollingerBandsWidth.ts | 2 +-
 src/STOCH/StochasticRSI.ts     | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/ADX/ADX.ts b/src/ADX/ADX.ts
index c4fa00a4c..ecb92fa97 100644
--- a/src/ADX/ADX.ts
+++ b/src/ADX/ADX.ts
@@ -78,7 +78,7 @@ export class FasterADX extends NumberIndicatorSeries<HighLowCloseNumber> {
 
   update(candle: HighLowCloseNumber): void | number {
     const result = this.dx.update(candle);
-    if (result) {
+    if (result !== undefined) {
       this.adx.update(result);
     }
     if (this.adx.isStable) {
diff --git a/src/BBW/BollingerBandsWidth.ts b/src/BBW/BollingerBandsWidth.ts
index 4b898c4a6..ee35b577a 100644
--- a/src/BBW/BollingerBandsWidth.ts
+++ b/src/BBW/BollingerBandsWidth.ts
@@ -29,7 +29,7 @@ export class FasterBollingerBandsWidth extends NumberIndicatorSeries {
 
   override update(price: number): void | number {
     const result = this.bollingerBands.update(price);
-    if (result) {
+    if (result !== undefined) {
       return this.setResult((result.upper - result.lower) / result.middle);
     }
   }
diff --git a/src/STOCH/StochasticRSI.ts b/src/STOCH/StochasticRSI.ts
index 0a0557768..8750813f4 100644
--- a/src/STOCH/StochasticRSI.ts
+++ b/src/STOCH/StochasticRSI.ts
@@ -61,7 +61,7 @@ export class FasterStochasticRSI extends NumberIndicatorSeries {
 
   override update(price: number): void | number {
     const rsiResult = this.rsi.update(price);
-    if (rsiResult) {
+    if (rsiResult !== undefined) {
       const periodResult = this.period.update(rsiResult);
       if (periodResult) {
         const min = periodResult.lowest;