Pre-COVID High and COVID Low

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Overview
The "Pre-COVID High and COVID Low" indicator is designed to identify and mark significant price levels on your chart, specifically targeting the pre-COVID-19 high and the low during the initial COVID-19 market impact. This script is particularly useful for traders who are interested in analyzing how stocks or other financial instruments reacted during the onset of the COVID-19 pandemic, providing a historical perspective that may help in making informed trading decisions.

How It Works

• Date Ranges: The script uses predefined date ranges to calculate the highest and lowest price levels before and during the early stages of the COVID-19 pandemic. These ranges are:
  
• Pre-COVID High: Between January 1, 2020, and March 31, 2020.
  
• COVID Low: Between March 1, 2020, and March 31, 2020.
  
• Calculation Method:
  
• The highest price during the pre-COVID period is tracked and recorded as the "Pre-COVID High".
  
• The lowest price during the specified COVID period is tracked and recorded as the "COVID Low".
  
• Visibility Conditions: The script includes logic to ensure that these historical levels are only displayed if they fall within a range close to the current visible price range on the chart. This prevents the indicator from compressing the price scale unduly.
  

How to Use It

• Adding to Your Chart: To use this indicator, add it to any chart on TradingView. It works best with daily time frames to clearly visualize the impact over these specific months.
  
• Interpretation:
  
• The "Pre-COVID High" is marked with a red line and is labeled the first day it becomes applicable.
  
• The "COVID Low" is marked with a green line and is similarly labeled on its applicable day.
  
• Trading Strategy Consideration: Traders can use these historical levels as potential support or resistance zones for their trading strategies. These levels can indicate significant price points where the market previously showed strong reactions.