If you're using a tool like ledger, I don't think there's much ghostfolio could say to convert you. Seems like comparing apples to oranges. I'm not familiar with ledger, but at a glance, seems like it's made for a different audience with different needs.
In fact, I'm working on something alike Ghostfolio but that uses ledger as database. It's very much early stage and mostly proof of concept and hacked together scripts. But I'm moving it to both "tabula" and "bullboard":
Again: early. But tabula is my consolidation of random "beancount/ledger" stuff regarding running my small business and startup. And bullboard my consolidation of random "beancount/ledger" stuff regarding everything investment related. The latter is just a CLI tool for now, and barely works. But once the businesslogic is done, I plan to add a web-interface alike ghostfolio to it. A tad simpler, I think, though.
It won't "preserve" it: if you sell or buy at the wrong time and place, it won't prevent you. It's basically a way to visualize your portfolio: hows it doing, what are your allocations, how well are you keeping your strategy? do you need to rebalance?
Basically "bullboard" will be "yet another portfolio tracker/manager". Like so many out there (Ghostfolio, PortfolioDividendTracker etc), nothing new.
The only difference is that the source is your (existing) ledger/beancount file.
To be clear: it currently is a CLI application, but the goal is for it to be a web tool. Also selfhostable.
https://github.com/redstreet/fava_investor already exists in this space and is very similar: it's what I currently use. I don't like it, though. I dislike python for bookkeeping software and complex domain modelling. I dislike the UX of fava. And I prefer opinionated, focused software: call a spade a spade. Not "Assets", "Income" or "Transactions" but Stocks, ETFs, Bonds, Dividend, Sells, Buys etc.
