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963 posts
msg #25007
8/28/2002 8:37:20 AM

Directional Movement Indcators +DI, -DI, ADX

DI(days) Difference
DescriptionThe Directional Movement indicators are actually used as a system to detect trends within a stock, typically used for determining entry and exit points. Developed by Welles Wilder, a buy signal is determined by the +DI rising above the -DI; afterwards, once the +DI falls below the -DI, then a sell signal is generated. Additional, interpretations involve using crossover of the +DI and -DI to verify the buy or sell signal.

The ADX is computed by taking an exponential moving average of the ratio: absolute difference of the +DI and -DI and the sum of the +DI and iDI.

The DI Difference option subtracts the -DI(n) from the +DI(n). This can be used to find trends in the difference between the +DI and -DI, as well as discovering convergence or divergence between the two values.

*** Note ***
The DMI suite are cumulative indicators, so exact filters such as crossovers may produce results which may not match their charts. This is due to potential differences in the starting point of the calcuation. StockFetcher uses at least 2 years of historical data to compute the most recent value.

Fetcher[+DI(14) crossed above the -DI(14)]

Fetcher[-DI(14) crossed below the +DI(14)]

Fetcher[ADX(14) increasing for 4 days]

Fetcher[DI(14) Difference has been increasing for 5 days and the DI(14) Difference is above 0]

963 posts
msg #37388
8/10/2005 7:05:04 AM


When using the +DI or -DI inside set statements, you'll want to use PDI (for +DI) and MDI (for -DI).

For example:

set{my_diff, PDI - MDI}
show stocks where my_diff > 0
and draw +DI

StockFetcher Forums · Indicators and Measures · Directional Movement Indcators +DI, -DI, ADX<< >>Post Follow-up

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