Brokers & APIs

I knew this in theory and ignored it in practice because I didn't want to miss the move.

People model commissions as a subtraction at the end. That's fine for a slow strategy and wrong for a fast one, because cost per trade interacts with trade…

Some order types you can select are simulated by the platform rather than held at the exchange. Functionally similar, meaningfully different when things go…

Everything in this board about latency, routing, queue position and fill quality applies with enormous force to fast strategies and almost none to mine.

Short question. Is having a backup broker standard practice here, or is it overkill for someone running one strategy at modest size?

Something I don't see discussed: the psychological overhead of not fully trusting your setup.

Nothing dramatic happened. I just noticed, on a quiet morning, that I had two accounts available and had genuinely lost track of which one was selected — a…

hey all, night shift person here as usual. figured i'd share how i run things because i almost never see the market during "normal" hours and i've had to b…

Three habits, none of them clever:

Had a plan: if the app dies, log into the broker directly and close everything by hand.

Updates are the most common cause of a setup that worked yesterday and doesn't today. Four things, in order:

learned this the annoying way. depending on what you're subscribed to, premarket can be: everything, only one venue, delayed, or nothing at all while still…

I don't trust "connected" as a status. I trust a fill.

When your connection drops mid-position, what should happen? That's not a question for the network layer, it's a question about your risk.

hey all, night owl here as usual ☕

ok so this is less a question and more me putting my process on paper because writing it down keeps me honest.

been running perps for about two years now and the thing i keep coming back to is that basically none of my improvement came from better entries. i've rewr…