Why Strata is manual by design

Imagine a friend offers to keep your house tidy while you are out. Lovely. Then they clarify the arrangement: they will need a copy of your front door key, kept forever, in a drawer at their place, and occasionally they will pop in unannounced and rearrange the furniture. You would, reasonably, stop talking to this person.

This is more or less the deal every credential-linking portfolio tracker offers, except the house is your money and the key is your brokerage password. We thought about it for a while and decided we did not want the key. Strata never holds your brokerage credentials and never moves your funds. On purpose. Forever. (Yes, even when it would be convenient. Especially then.)

A password you hand over is a password you carry forever

Here is the uncomfortable bit about giving an app your login. You do not get it back. You have not lent it out, you have copied it, and now your worst day is whatever their worst day turns out to be.

And the worst day arrives quietly. Aggregation pipelines do not explode with sirens. They just drift. A position doubles. Another vanishes. A number is suddenly slightly wrong and you are left squinting at it, playing detective, trying to work out whether the mistake is yours or the machine’s. A book you cannot reconcile is a book you cannot trust, and decision-support built on a book like that is worse than a spreadsheet, because at least the spreadsheet never pretended.

The “manual entry sounds exhausting” objection (it is mostly a vibe)

People hear “type it in yourself” and picture a long grey afternoon, a mug going cold, thousands of rows. Then they actually count their holdings. Most investors own dozens of positions, not thousands. Tens of things. An evening, generously. Once.

The blotter is built for exactly this. It ends in a sort of friendly ghost row that is always waiting for the next entry: type a symbol, tab through quantity and cost, press Enter, repeat. The trade ticket shows you a running estimate of the fill before you commit it, so nothing happens by surprise. It is closer to jotting a list than to data entry.

And then the genuinely good part begins, which is that you stop and Strata does not. From that one set of entries it derives the rest: live valuation, FIFO tax lots, realised profit and loss, dividend projection, factor scores, alerts, all of it. You spend the minutes. The derivation compounds for years. (This is also roughly how a thesis earns its keep over time in the discipline loop, and how every factor cell stays honest in factors without black boxes, same bargain, different corner of the app.) You own the ledger. We own the derivation.

A ledger with no eraser

Owning your entries unlocks something quietly powerful, which is that we can treat the ledger as immutable and actually mean it.

Made a mistake? You do not delete it. You void it. The entry gets flagged and excluded from every calculation, but it stays in the history, sitting there with its little asterisk. Lots and cash are not stored facts that can rot, they are derived by replaying the ledger from the start, so a correction can never quietly leave stale state lying around behind it. Every change is attributed and timestamped in the audit log. Who, what, when. No exceptions.

This is the same reason accountants do not use erasers. Not because they enjoy ceremony, but because a record you can scribble over is not a record, it is a rumour. And a rumour is a strange thing to bet your money on.

The whole arrangement only works because the system of record is explicit and yours. You wanted a clear answer to “where do I actually stand,” and a clear answer needs a book you can trust all the way down. The unglamorous route to that is the one nobody markets: keep the key yourself, draw the map once.