Algorithmic Trading can be a complex subject. Keep your knowledge current with this glossary of key concepts, terminology, and technical indicators.
A technical indicator that plots changes in the value of the advance-decline index over a certain time period. Each point on the chart is calculated by taking the difference between the number of advancing/declining issues and adding the result to the previous period's value, as shown by the following formula:
A/D Line = (# of Advancing Stocks - # of Declining Stocks) + Previous Period's A/D Line Value