Buy and Sell Signal at 50% Retracement, Based on MANDO MODEL

the sell is taking out a previous high. leave some runners and practice safe trading.
Explanation of Behavior:
When the price retraces 50% of the defined range (from the low to high), a Buy signal is triggered.
After the Buy signal, if the price moves above the previous high (after retracement), a Sell signal is triggered.
Once a Sell signal is triggered, the range is reset, and a new range needs to form before another signal can be triggered.
Test this:
Apply the script to your chart.
Check for Buy signals when the price crosses the 50% retracement level.
Sell signals will trigger once the price breaks above the previous high after the retracement phase.
Ensure that the signals are plotted as arrows on the chart and that the background color changes to indicate Buy or Sell.
Alerts Setup:
To set up alerts:

Right-click on the chart and select Add Alert.
For Buy Signal: Choose the condition Buy and Sell Signal at 50% Retracement with Top Break > Buy Signal.
For Sell Signal: Choose the condition Buy and Sell Signal at 50% Retracement with Top Break > Sell Signal.
Set your preferred alert type (popup, email, etc.).
Click Create to set the alert.