How to Use the Free Demo

Step 1. Go to MetaTrader Market product page.

Via the terminal
Open MetaTrader 4 'Terminal' / MetaTrader 5 'Navigator' window and select 'Market':
menubar view terminal / navigator market

Enter 'volumebyprice.com' in the search box. or

Via web browser
MetaTrader 4 https://mql5.com/en/market/product/35577
MetaTrader 5 https://mql5.com/en/market/product/35579

Step 2. Sign in to your MQL5.com account (if you do not have an account, sign up here ).

Step 3. Click the 'Download Demo' button.

Step 4. Open historical data replay 'Strategy Tester' window:
menubar view strategy tester
Select the 'Volume by Price' indicator. Optionally adjust default configuration via the 'Inputs' tab. Click the 'Start' button.

References
"Testing Visualization - MetaTrader 5 Help" https://www.metatrader5.com/en/terminal/help/algotrading/visualization
"Setup - Tester - MetaTrader 4 Help" https://www.metatrader4.com/en/trading-platform/help/overview/strategy_tester/strategy_tester_setup