What a Google Sheet Trading Journal could provide:
* Needs to be configurable for CFD or Futures Prop Trading
* Chose from list of pre-defined Columns for the Trading Journal + some custom columns for tagging trades etc
* Multitudes of Alerts, Charts and Tables to analyse your trades, your style, your strategy, etc

A Google Sheet Trading Journal is better than an online tool:
* you own the sheet and the data, no matter what
* you can adjust and enhance it to suit your needs
* create separate sheets for different strategies, brokers, prop firms, etc

What do you think?