Does Gen3 support pit traded contracts or like Gen1 / TB only electronic contracts?
Gen3 supports trading of pit futures contracts in theory, but as of today no C2 compatible broker currently allows the trading of pit contracts. (There are limited exceptions to this in some of the "softs." In these cases the broker will automatically route all orders to the pits, even if you type electronic contract symbols, due to liquidity concerns, but these are rare cases.)
what class of instruments (pit) are you trying to trade?
Currently trading C2 Gen1 with TB/IB, but considering to change to Gen3.
Today I had a reject of GC due to it being an invalid symbol. I’ve asked the system developer to change it to QGC, but was curious to know how this would be for Gen3.
So you trade metals?