I didn't make it clear about the continuous contract symbols (ES1!, AP1!, etc). Their volume is identical to the individual tradable contracts, but still they're not tradable themselves. They're mainly created for long-term charting purposes, like any artifical index (eg. XJO). They're useful until an individual contract nears expiry - at that point the continuous contract will often not match up with the individual contract.
SPX is S&P500 index. But there's also a tradable CFD symbol called SPX500.
The true futures contracts will have suffixes that denote the month of expiry (June is ESM2024). CFDs won't. CFD providers have names which are very similar. They allow you to trade the CFD of an index or a CFD of a futures contract.
