MQL4参考标准常量，列举和架构指标常量 价格常数

Price Constants

Calculations of technical indicators require price values and/or values of volumes, on which calculations will be performed. There are 7 predefined identifiers from the ENUM_APPLIED_PRICE enumeration, used to specify the desired price base for calculations.

ENUM_APPLIED_PRICE

ID	Value	Description
PRICE_CLOSE	0	Close price
PRICE_OPEN	1	Open price
PRICE_HIGH	2	The maximum price for the period
PRICE_LOW	3	The minimum price for the period
PRICE_MEDIAN	4	Median price, (high + low)/2
PRICE_TYPICAL	5	Typical price, (high + low + close)/3
PRICE_WEIGHTED	6	Weighted close price, (high + low + close + close)/4

The iStochastic() technical Indicator can be calculated in two ways using:

either only Close prices;
or High and Low prices.

To select a necessary variant for calculation, specify one of the values of the ENUM_STO_PRICE enumeration.

ENUM_STO_PRICE

ID	Description
STO_LOWHIGH	Calculation is based on Low/High prices
STO_CLOSECLOSE	Calculation is based on Close/Close prices

指标常量系列数组标识符