No, you cannot program custom indicators directly through the MT5 WebTrader. To create or modify custom indicators for MT5, you need to use the MetaEditor program that comes bundled with the desktop version of MT5 for PC or Mac.
How to program custom indicators for MT5:
Install the desktop version of FXTRADING.com Trader (MT5) on your PC or Mac
Access MetaEditor by:
Right-clicking in the Navigator window within MT5
Selecting "Create" and then "Indicator"
Or using the Tools menu and selecting "MetaEditor"
Write your indicator code using MQL5 programming language
Compile the indicator to check for errors
Test and implement your custom indicator
Once you've created your custom indicator using MetaEditor on the desktop version, you can use it in your MT5 platform. However, please note that while you can use pre-built custom indicators in WebTrader, the programming functionality is only available in the desktop application.
For traders who prefer web-based trading but need custom indicators, we recommend:
Creating indicators on the desktop version first
Using the desktop version for advanced customization needs
Using WebTrader for more basic trading functions where custom indicators aren't required
If you need assistance with programming indicators, consider exploring the MQL5 community resources or consulting with a programming specialist.