---
title: "Why does the Open, High, Low, Close (OHLC) of historical data on the Arrow charts sometimes not match the records updated in NSE or BSE?"
description: "You will notice differences between OHLC historical data on Arrow charts and NSE or BSE records because iRage adjusts the data for corporate actions."
category: arrow
subcategory: charts-and-orders
slug: why-does-the-open-high-low-close-ohlc-of-historical-data-on-the-arrow-charts-som
canonical: https://support.arrow.trade/arrow/charts-and-orders/why-does-the-open-high-low-close-ohlc-of-historical-data-on-the-arrow-charts-som/
---

# Why does the Open, High, Low, Close (OHLC) of historical data on the Arrow charts sometimes not match the records updated in NSE or BSE?

> You will notice differences between OHLC historical data on Arrow charts and NSE or BSE records because iRage adjusts the data for corporate actions.

## Short answer

You will notice differences between OHLC historical data on Arrow charts and NSE or BSE records because iRage adjusts the data for corporate actions.

## Corporate action adjustments

Arrow modifies historical OHLC data to account for corporate actions including:

Bonus issues

Stock splits

Rights issues

Spin-offs

Extraordinary dividends (2% and above of the underlying stock's market value)

## Why the data differs

NSE and BSE websites display the precise trading prices of stocks without these corporate action adjustments. This means:

Arrow charts show adjusted prices that reflect the impact of corporate actions

NSE/BSE records show the actual trading prices from those dates

The adjustments ensure price continuity and accurate technical analysis on Arrow charts

This corporate action adjustment helps you analyse price movements more accurately by eliminating artificial price gaps caused by corporate actions.

## Related

- Browse more in [charts and orders](/arrow/charts-and-orders/)
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- Trade on Arrow: [app.arrow.trade](https://app.arrow.trade)
- Support: [support@arrow.trade](mailto:support@arrow.trade)

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Source: https://support.arrow.trade/arrow/charts-and-orders/why-does-the-open-high-low-close-ohlc-of-historical-data-on-the-arrow-charts-som/
Publisher: Arrow / iRage Broking Services LLP