Is it possible to make a trustless exchange smart Contracts on the dex?

[pc]

This is currently not possible. (Using OPEN.LTC or an escrow works, but is not trustless.)

Atomic Cross-Chain Trading is the important buzzword here, but it doesn't look like this is going to be implemented soon.

[abit]

In general, you can just place an order on the market: https://wallet.bitshares.org/#/market/BTC_OPEN.LTC

For swapping, you can watch this: https://github.com/bitshares/bitshares-ui/issues/866

About escrow and OTC service, will be discussed in this ticket: https://github.com/bitshares/bsips/issues/44

[Emadovesky]

For example if I want to exchange some Ltc for bitbtc with some one is it possible to create a smart contact to track the transaction on a block explorer and once It find that the Ltc arrived at my address automatically release the bitbtc to the other party?
This would make great benefits to the dex