From f7189b3be43fbeff49bb06d5c78c466286c9ad08 Mon Sep 17 00:00:00 2001
From: Dmitriy Yurov <narkozzforb@gmail.com>
Date: Wed, 18 Sep 2024 18:02:21 +0200
Subject: [PATCH] add moment value for MFI

---
 src/mfi.ts | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/mfi.ts b/src/mfi.ts
index 08b52d1..7e218b1 100644
--- a/src/mfi.ts
+++ b/src/mfi.ts
@@ -49,6 +49,26 @@ export class MFI {
     }
 
     momentValue(high: number, low: number, close: number, volume: number) {
-        return 0;
+        const typicalPrice = (high + low + close) / 3;
+        const moneyFlow = typicalPrice * volume;
+
+        if (!this.pevTypicalPrice) {
+            return;
+        }
+
+        const positiveMoneyFlow = typicalPrice > this.pevTypicalPrice ? moneyFlow : 0;
+        const negativeMoneyFlow = typicalPrice < this.pevTypicalPrice ? moneyFlow : 0;
+        
+        if (!this.posCircular.filled) {
+            return;
+        }
+        
+        const posRedunant = this.posCircular.peek();
+        const negRedunant = this.negCircular.peek();
+        const negativeMoneyFlowSum = this.negativeMoneyFlowSum + negativeMoneyFlow - negRedunant;
+        const positiveMoneyFlowSum = this.positiveMoneyFlowSum + positiveMoneyFlow - posRedunant;
+        const moneyFlowRatio = positiveMoneyFlowSum / negativeMoneyFlowSum;
+
+        return 100 - 100 / (1 + moneyFlowRatio);
     }
 }