Posted something similar before but now know exactly what graph is needed in IE DIY portfolios.
Currently, we just have a value graph. It’s not useful at all really when visualising portfolio growth/decline due to big jumps when adding funds. We need a cumulative TWR graph, here’s an example on Interactive Brokers:
Even easier, implement the same toggle you added in the managed portfolios. You can toggle and net out any contributions. Not included in the DIY portfolios, this feature is frequently requested.