Wednesday, January 16, 2013

Host-microbial interactions in inflammatory bowel disease

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Trend Line Breaks

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Trend line breaks are defined as the price moving towards a trend line, touching the trend line, and then breaking through the trend line, and continuing in its new direction. Trend line breaks happen because trend lines show where the price is likely to experience support or resistance in the future, and at some point this support and resistance is going to weaken.

Trend line breaks are counter trend trades, because they expect the price to continue in its new direction (against the previous trend). For an upward trend line (and an upward trend), a trend line break would be a short trade, where the trader sells at a price near the trend line, and then buys at a price below the trend line. For a downward trend line (and therefore a downward trend), a trend line break would be a long trade, where the trader buys at a price near the trend line, and then sells at a price above the trend line.

Trend line breaks are not usually traded independently, but are combined with other trading information, such as price movement or volume information. For example, a complete trend line trading system might consist of a trend line break in combination with strong volume in the correct direction.

The example chart shows a downward trend, and its associated downward trend line, with a trend line break shown in yellow (view the chart in full size).


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Using RNAi screening to identify factors involved in intrinsic innate immunity

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Directional Movement Index

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The Directional Movement Index (also known as DMI) is a momentum indicator that was developed by J. Welles Wilder. It is calculated using the price, compares the current price with the previous price range, and displays the result as an upward movement line (+DI), and a downward movement line (-DI), between 0 and 100. The DMI also calculates the strength of the upward or downward movement, and displays the result as a trend strength line (ADX). The DMI is displayed on its own chart, separate from the price bars, and is the lower section in the chart shown above.

Description: The DMI is the ratio of exponential moving averages of the greater of the upward (U) and downward (D) price movements, and the true range (TR). Calculation:
U = Hn - Hn-1
D = Ln-1 - Ln
TR = (Hn - Ln) | (Hn - Cn-1) | (Cn-1 - Ln)
EMAUP = EMAUn-1 + ((2 / (n + 1)) * (Un - EMAUn-1))
EMADOWN = EMADn-1 + ((2 / (n + 1)) * (Dn - EMADn-1))
EMATR = EMATRn-1 + ((2 / (n + 1)) * (TRn - EMATRn-1))
+DI = EMAUP / EMATR
-DI = EMADOWN / EMATR

    DX = ABS(+DI - -DI) / (+DI + -DI)
ADX = EMADXn-1 + ((2 / (n + 1)) * (DXn - EMADXn-1))

The Directional Movement Index can be used in both ranging and trending markets. In general, when the +DI line is above the -DI line, the market is moving upwards, and when the -DI line is above the +DI line, the market is moving downwards. The ADX line shows the strength of the move, and the market is considered to be trending when the ADX line is above 30, and ranging when the ADX line is below 30. There are several trading systems that use the DMI, so there are several alternative uses of both the DI lines, and the ADX line.


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Audit Time: Is your Site Prepared?

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