Sandisk Is Up 800%+ YTD. What Does Its Chart Show Us?Sandisk CorporationBATS:SNDKmoomooSandisk SNDK hit a new all-time high Thursday after the storage-device maker soared 800%+ year to date. Where might the stock go next? Let's see what its chart and fundamentals say: Sandisk's Fundamental Analysis SNDK hit a $2,189.68 record intraday peak Thursday morning, up 822% YTD and more than 6,100% from the $35.06 it opened at when Western Digital WDC spun the company off into a separate stock on Feb. 13, 2025. Western Digital had acquired Sandisk in 2016, selling memory cards, USB drives and solid-state drives under both companies' brand names for nine years. But WDC packaged all of its flash-storage businesses into Sandisk in early 2025 and created an independent, publicly traded firm out of them. (Western Digital retained its hard-drive business, as well as a host of licensing arrangements.) Some 16 months later, both names are part of the often-spoken-about memory/storage basket that you might have seen me discuss at one time or another on financial television. (Other stocks in this basket are Micron Technology MU and Seagate Technology STX). Sandisk won't report earnings again until mid-August, when Wall Street expects it to release fiscal Q2 results. It's early, but analysts currently forecast that the firm will announce $33.17 in adjusted earnings per share on almost $8.3 billion in revenue. That would compare to -- get this -- just $0.29 of adjusted EPS on $1.9 billion of revenue in the year-ago period. In fact, 13 of the 16 sell-side analysts who've expressed public opinions so far on SNDK's upcoming results have already increased their estimates. (The other three have done nothing, while zero analysts have cut their forecasts.) Sandisk's Technical Analysis Next, let's look at SNDK's chart going back about eight months and running through midday Thursday (June 18): Readers will first see that SNDK rallied in early 2026 out of a bullish-flag pattern. Marked with green lines and blue-green shading at the chart's center, this is a pattern of trend continuance. Next, Sandisk developed over April through June what looks like a rising-wedge pattern of bearish reversal, denoted by orange shading at the chart's right. SNDK tried in recent days to break out of this pattern to the upside, but when a stock exhibits a bullish breakout from a bearish pattern (or vice versa), the move is often exaggerated. That could be the case here. We'll just have to wait and see. Meanwhile, Sandisk has used its 21-day Exponential Moving Average (or "EMA," denoted by a squiggly green line) as support for the past three months. In fact, the stock hasn't even come close to testing its 50-day Simple Moving Average (or "SMA," marked with a blue line) throughout this stretch, showing just how strong the name has been. Looking at Sandisk's other technical indicators, the stock's Relative Strength Index (marked with a gray line at the chart's top) is quite robust and bordering on overbought territory. Similarly, Sandisk's daily Moving Average Convergence Divergence indicator (or "MACD," denoted by blue bars, a black line and a gold line at the chart's bottom) is postured quite bullishly. For starters, the histogram of the 9-day EMA (the blue bars) has moved above the zero-bound. That's a bullish sign. In addition, the 12-day EMA (the black line) has recrossed above the 26-day EMA (the gold line) -- with both already deep into positive territory. That's also a bullish signal. Of course, those looking for a bearish set-up just might see one in the most recent price action. Should SNDK have just put in a top at Thursday's record high, it wouldn't take much for a head-and-shoulders pattern of bearish reversal to develop. (Moomoo Technologies Inc. Markets Commentator Stephen "Sarge" Guilfoyle was long SNDK, WDC, MU and STX at the time of writing this column.) This article discusses technical analysis, other approaches, including fundamental analysis, may offer very different views. The examples provided are for illustrative purposes only and are not intended to be reflective of the results you can expect to achieve. Specific security charts used are for illustrative purposes only and are not a recommendation, offer to sell, or a solicitation of an offer to buy any security. Past investment performance does not indicate or guarantee future success. Returns will vary, and all investments carry risks, including loss of principal. This content is also not a research report and is not intended to serve as the basis for any investment decision. 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