Agree. Lighthouse, you might want to read this:
http://en.wikipedia.org/wiki/Algorithmic_trading
Algorithmic trading can be on any time scale, not just high frequency. If I write some code to scan stocks for buying and selling opportunities at the close of market each day, that is still within the scope of "Algorithmic trading". MemFX is correct, high frequency trading is just a subset of algorithmic trading.
