Photo courtesy of Roku.

Netflix Inc. (NASDAQ: NFLX) and Roku Inc. (NASDAQ: ROKU) are two streaming stocks moving during Wednesday's trading session. Netflix is trading lower after the company issued second-quarter sales guidance below estimates. Roku is trading lower in sympathy with Netflix.

Both stocks are nearing key lines on the chart; a break of these lines could bring about a more powerful move.

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Netflix Daily Chart Analysis: Netflix gapped down to near a key level into Wednesday morning.

The stock gapped down below both the 50-day moving average (green) as well as the 200-day moving average (blue), indicating sentiment could be turning bearish.

These indicators may hold as resistance again in the future.

The stock was down 7.24% at $509.78 at last check.

Key Netflix Levels To Watch: The stock has been building higher lows throughout the last six months into what technical traders may call an ascending triangle pattern.

The ascending triangle shows a flat top resistance near the $575 level, as this is a price level where sellers have always been able to win against the buyers.

A break above flat top resistance with consolidation gives the stock a chance to push higher.

A break below the higher lows may cause the overall trend to change.

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Roku Daily Chart Analysis: Roku is nearing a key level where, if it is unable to bounce, it may see a strong downward push.

The stock is trading below the 50-day moving average (green) and above the 200-day moving average (blue), indicating the stock is most likely in a period of consolidation.

The 50-day moving average may hold as resistance and the 200-day moving average may hold as support.

Roku shares were down 0.9% at $351.66 at last check.

Key Roku Levels To Watch: The Roku chart shows it may be forming what technical traders call a head-and-shoulders pattern.

The head-and-shoulders pattern is a bearish reversal pattern that may be confirmed if the stock can fall below where buyers were previously found near the $320 level.

The higher lows show the overall trend has been bullish and the line connecting the lows would need to hold as support or the stock may begin a downtrend.