Another bull lines up behind Shopify.Shopify (SHOP 0.73%) has long put up enviable growth numbers, but its valuation has historically made the stock volatile.The e-commerce software leader continues to trade at a high valuation, acting like a battleground stock at times as investors speculate on how long its rapid growth will continue, especially after its plan to expand into logistics through the Deliverr acquisition backfired.However, Shopify impressed investors with its latest earnings report in August, ...