MasterDATA's Composite Plug-in for
MetaStock
and historical composite breadth datafiles on 34
major stock indexes and the 181 highest trade volume
ETFs.
The following two formulas allow MetaStock to access any statistic in your downloaded historical composite breadth datafiles to address a wide variety of situations from very simple to very complex:
ExtFml( "MD.BySym", YourValue) - 1 parameter This formula will appear to act much like a "normal" MetaStock function. The plug-in determines the MetaStock base * symbol, and returns a value based upon that symbol, the statistic and the base symbol's data period. But, instead of calculating the statistic within MetaStock itself, the above formula calls the plug-in. The plug-in looks for a datafile corresponding to the base symbol (plus the configured file extension) and retrieves the appropriate value from that datafile. In other words, if you have an Intel (symbol: INTC) chart open and apply a custom indicator containing the above formula, the plug-in will look for a datafile named INTC.csv (or your configured file extension) in the directory you specified in setup. Once the plug-in finds your datafile, the column containing the statistic name ("YourValue" in the above example) is determined and the column's values and dates are synchronized with MetaStock's price data for INTC. Then the values are returned to MetaStock. MetaStock then uses these retrieved values to calculate your custom indicator.
* The "base" symbol is the symbol currently being used by your MetaStock function. If you are looking at a chart of the PowerShares QQQ ETF, the "base" symbol is the symbol for the PowerShares QQQ ETF, QQQQ.
ExtFml( "MD.ByFile",CompositeSymbol, YourValue, DataPeriod) - 3 parameters This formula provides much greater control over the data retrieved by your MetaStock function. Three parameters are entered as follows:
Composite Symbol To use statistics from a specific datafile, enter that file's symbol. To use the base symbol currently used by the active MetaStock function, enter "BASE".
Statistic Value As in the previous plug-in formula above, the plug-in finds your datafile as specified in the first parameter, then finds the column containing the statistic name ("YourValue" in the above example) and then reads the column's values.
Data Period To use statistics from a specific data period, enter the desired data period (d or daily, w or weekly, m or monthly or q or quarterly) as the third parameter. To use the data period of the current base symbol, enter "BASE".
The use of this plug-in formula allows charts and indicators never before possible in MetaStock such as multiple data periods in the same chart, constructing an indicator for one static issue that uses the base data period of the current MetaStock function and much more.
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