Market Order Fill Prices Off (sometimes well outside Low-High range)

Hello,

I’ve had issues with market order prices being very significantly off from the actual value they should be filled at (usually in the adverse direction). I understand some variance and conservatism in the model figuring out where the price would actually get executed; however, the prices that C2 calculates are very often well outside of the OHLC range for the day (sometimes by several percent!) for stocks with significant daily volume.

I’m implementing the exact same OTO market orders at market open in parallel in my brokerage account (TD Ameritrade), and I’m not getting nearly the same prices quoted for the conditional order that C2 estimates.

Also, my submitted tickets to correct the price fills never get addressed unless I email someone after submitting a ticket. The account profile is modified when it does get fixed, but the overall drop due to the incorrect fill still shows up as an artificial drawdown.

Is it possible that the model for the market order fill price on equities can be improved? What’s the best way to expedite incorrect price fills without having to email C2 help each time it occurs as a frequent trader?

Thanks!

Allen

Hi, Allen:

I see what happened here. You are using conditional orders that are being filled at the very beginning of the trading day, and you don’t have any real-life AutoTraders (yet!). So C2 is simulating your fill prices using the bid/ask spread… except the bid/ask is not correct at the immediate onset of the trading day. Soooo… I have implemented some changes which I believe will prevent this in the future.

In the meantime, I went ahead and corrected the wrong hypothetical fill prices you reported.

Matthew

Thank you! I appreciate you looking into this and addressing my concern.