[rallies]

We're running some live experiments these days, for both stocks and options. https://rallies.ai/arena

[philipwhiuk]

With actual money? Or still fake money?

[dhosek]

Fake money is better than nothing, but one hopes that at the very least they’re correctly managing prices with the bid-ask spread, although real money would tend to influence what the actual numbers would be (small dollar amounts likely getting worse pricing, large dollar amounts potentially impacting the movement of the market).