By Bret Kenwell Amazon stock is working on its sixth straight daily rally ahead of its 20-for-1 stock split. Here’s what the charts say now. Shares of Amazon (AMZN) – Get Amazon.com, Inc. Report have spent most of the year down in the dumps, as it suffered a peak-to-trough decline of 46%. That, however, has not been the case lately. The stock is up about 2.5% on Thursday and is currently riding a six-session win streak. Amid that stretch, Amazon stock has rallied 20%. The move comes ahead of the company’s 20-for-1 stock split, which will go into effect on Monday, June 6. Some have wondered if …