In executing a financial strategy, there are several types of transactions that can be used across different asset classes, such as equities, derivatives, fixed income, foreign exchange (FX), and cryptocurrency.

In equities, common transaction types include buying and selling stocks, as well as more advanced strategies such as short selling and options trading. Short selling involves borrowing shares from another investor and selling them in the market with the expectation that the price will fall, allowing the investor to buy back the shares at a lower price and return them to the lender for a profit. Options trading, on the other hand, allows investors to buy or sell the right to buy or sell a stock at a certain price at a later date.

In derivatives, common transaction types include futures and options contracts. Futures contracts are agreements to buy or sell an underlying asset at a future date at a predetermined price, while options contracts give the holder the right, but not the obligation, to buy or sell the underlying asset at a certain price at a later date.

In fixed income, common transaction types include buying and selling bonds, as well as interest rate swaps, which are agreements to exchange a stream of cash flows based on a fixed interest rate for a stream of cash flows based on a floating interest rate.

In FX, common transaction types include buying and selling currencies, as well as forwards, futures, and options contracts on currencies.

In cryptocurrency, common transaction types include buying and selling digital currencies, as well as trading in crypto derivatives such as futures, options and swaps.

In all these transactions, implementation such as automation and the use of triggers can be used to initiate trades based on certain market or news events. Additionally, modifications can be made to the trade based on these triggers, such as adjusting the trade's size or exiting the trade early.