Home Blockchain Lesson #1: How to use Averages to Buy and Sell. Blockchain Lesson #1: How to use Averages to Buy and Sell. By Chris Butler - April 3, 2020 1296 0 FacebookTwitterPinterestWhatsApp source RELATED ARTICLESMORE FROM AUTHOR Blockchain and Payment Security: A Match Made in Heaven? The Evolution of Cryptocurrency as a Payment System Tecnologia, Medidas de Segurança e Cassinos Online