Complex sentence: The Commodity Channel Index (CCI) is an oscillator originally introduced by Donald Lambert in an article published in the October 1980 issue of "Commodities" magazine (now known as "Futures" magazine).
Split into simpler sentences: The Commodity Channel Index (CCI) is an oscillator originally developed by Donald Lambert. He introduced this new oscillator in an article published in the October 1980 issue of "Commodities" magazine (now known as "Futures" magazine).