Unusual Options Activity Insight: Alliance Data Systems Alliance Data Systems (NYSE: ADS ) shares experienced unusual options activity on Tuesday. The stock price moved down to $103.19 following the option alert. Sentiment: BULLISH Option Type: TRADE Trade Type: CALL Expiration Date: 2021-09-17 Strike Price: $160.00 Volume: 525 Open Interest: 1057 Three Signs Of Unusual Options Activity Extraordinarily large volume (compared to historical averages) is one indication of unusual options market activity. Volume refers to the total number of contracts traded over a given time period when discussing options market activity. Open interest is the number of unsettled contracts that have been traded but not yet closed by either counterparty. In other words, open interest represents the quantity of contracts that individual parties have written but not yet found a counterparty for (i.e. a buyer finding a seller, or a seller finding a buyer). Another sign of unusual activity is the Full story available on Benzinga.com