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| Symbol | Name | Industry | Sector | Exchange | Cap | Cap, mln | Last | Change | Change, % | Volume |
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Axcelis Technologies Inc | Semiconductor Equipment & Materials | Technology | NASDAQ | Mid | 2,599.6 |
82.72 |
0.58 | 0.71 | 135,128 |
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Aehr Test Systems | Semiconductor Equipment & Materials | Technology | NASDAQ | Small | 744.16 |
23.39 |
-0.3 | -1.27 | 267,872 |
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Alset Inc | Real Estate - Development | Real Estate | NASDAQ | Micro | 116.22 |
2.32 |
-0.1 | -4.13 | 32,208 |
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First Trust Active Factor Mid-Cap Etf | Exchange Traded Fund | Financial Services Etf | NYSE | | |
33.48 |
0.03 | 0.09 | 2,736 |
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Amprius Technologies Inc | Electrical Equipment & Parts | Industrials | NYSE | Small | 1,630.99 |
11.45 |
0.19 | 1.69 | 3,776,940 |
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Agora Inc ADR | Software - Application | Technology | NASDAQ | Small | 317.54 |
3.46 |
-0.01 | -0.29 | 102,138 |
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Ardent Health Inc | Medical Care Facilities | Healthcare | NYSE | Mid | 2,083.63 |
14.49 |
0.03 | 0.21 | 36,807 |
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Amtech Systems Inc | Semiconductor Equipment & Materials | Technology | NASDAQ | Micro | 102.2 |
7.05 |
0 | 0 | 42,951 |
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Atossa Therapeutics Inc | Biotechnology | Healthcare | NASDAQ | Micro | 111.51 |
0.80 |
-0.0145 | -1.78 | 541,799 |
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Avantis All Equity Markets Value Etf | Exchange Traded Fund | Financial Services Etf | NYSE | | |
69.83 |
-0.1 | -0.14 | 987 |
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 Bollinger Bands - Technical Analysis from A to Z
Bollinger Bands are similar to moving average envelopes.
The basic interpretation of Bollinger Bands is that prices tend to stay within the upper- and lower-band. The distinctive characteristic of Bollinger Bands is that the spacing between the bands varies based on the volatility of the prices. During extreme price changes (i.e., high volatility), the bands widen to become more forgiving. During periods of stagnant pricing (i.e., low volatility), the bands narrow to contain prices.
Envelopes (Trading Bands) - Technical Analysis from A to Z
An envelope is comprised of two moving averages. One moving average is shifted upward, while the second is shifted downward. Envelopes define the upper and lower boundaries of a security's normal trading range. A sell signal is generated when the security reaches the upper band, whereas a buy signal is generated at the lower band. The optimum percentage shift depends on the volatility of the security - the more volatile, the larger the percentage.
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