MQL4 Reference 
Technical indicators iRVI
| double iRVI( |
string symbol, int timeframe, int period, int mode, int shift) |
Calculates the Relative Vigor index and returns its value.
Parameters:
| symbol |
- |
Symbol the data of which should be used to calculate indicator. NULL means the current symbol. |
| timeframe |
- |
Timeframe. It can be any of Timeframe enumeration values. 0 means the current chart timeframe. |
| period |
- |
Number of periods for calculation. |
| mode |
- |
Indicator line index. It can be any of Indicators line identifiers enumeration value. |
| shift |
- |
Index of the value taken from the indicator buffer (shift relative to the current bar the given amount of periods ago). |
Sample:
double val=iRVI(NULL, 0, 10,MODE_MAIN,0);
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