The Diffiulty Ribbon speaks to the impact of miner selling pressure on a proof-of-work coin`s price action. When network difficulty reduces its rate of climb, miners are going out of business, leaving only the strong miners who proportionally need to sell less of their coins to remain operational, this leads to less sell pressure and more room for bullish price action. The best times to buy are zones where the ribbon compresses. The ribbon consists of simple moving averages of network difficulty so the rate of change of difficulty can be easily seen.