What do the abbreviations BTO, STO, STC, BTC mean?

When you subscribe to a trading system, you will see trading instructions that include these abbreviations. Unlike most brokers, Collective2 specifies whether each order is an opening or closing order. This:

BTO: "Buy To Open" - Buy in order to establish a new long position

STO: "Sell To Open" - Sell short in order to establish a new short position. (For stocks, abbreviation becomes SSHORT).

BTC: "Buy To Close" - Buy in order to cover (close) an already-open short position.

STC: "Sell To Close" - Sell in order to exit and already-open long position.

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