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ta ​

ta package provides some common technical analysis functions.

between & range ​

between(a: number, b: number, c: number): bool

alias: range

When a is between b and c, return true, otherwise return false.

nv
ta.between(3, 1, 4);
// true

ta.between(0, 1, 4);
// false

cross ​

cross(a: number, b: number): bool

When a crosses b from below, return true, otherwise return false.

longcross ​

longcross(a: number, b: number, n: number): bool

When a is less than b for n periods, and a crosses b from below this period, return true, otherwise return false.

valuewhen ​

valuewhen(x: bool, n: any): any

When x is true, return n's current value, otherwise return n's previous value.

select ​

select(x1: bool, n1: any, x2: bool, n2: any, ...): any

When x1 is true, return n1, when x2 is true, return n2, and so on.

orelse ​

orelse(x: any?, y: any): any

When x is not nil, return x, otherwise return y.

all ​

all(x: bool, n: number): bool

When n periods of x are all true, return true, otherwise return false. n is 0 means from the first valid value.

any ​

any(x: bool, n: number): bool

When n periods of x have at least one true, return true, otherwise return false. n is 0 means from the first valid value.

barslast ​

barslast(x: bool): number

Get the current period number since the last time x is true.

barssince ​

barssince(x: bool): number

Get the current period number since the first time x is true.

count ​

count(x: bool, n: number): number

Get the number of times x is true in n periods. n is 0 means from the first valid value.

dma ​

dma(x: number, n: number): number

Get the dynamic moving average of x.

ema ​

ema(x: number, n: number): number

Get the n period exponential moving average of x.

filter ​

filter(x: bool, n: number): bool

Return true when x is true and its previous n periods are all false.

hhv ​

hhv(x: number, n: number): number

Get the maximum value of x in n periods. n is 0 means from the first valid value.

hhvbars ​

hhvbars(x: number, n: number): number

Get n periods of x maximum value to the current period number. n is 0 means from the first valid value.

llv ​

llv(x: number, n: number): number

Return the minimum value of x in n periods.

llvbars ​

llvbars(x: number, n: number): number

Get n periods of x minimum value to the current period number. n is 0 means from the first valid value.

sum ​

sum(x: number, n: number): number

Get the sum of x in n periods. n is 0 means from the first valid value.

mular ​

mular(x: number, n: number): number

Get the product of x in n periods. n is 0 means from the first valid value.

ma ​

ma(x: number, n: number): number

Get n period simple average of x. n is 0 means from the first valid value.

mema ​

mema(x: number, n: number): number

Get n period modified exponential moving average of x.

sma ​

sma(x: number, n: number): number

Get n period simple moving average of x.

tma ​

tma(x: number, n: number): number

Get n period triangular moving average of x.

wma ​

wma(x: number, n: number): number

Get n period weighted moving average of x.

last ​

last(x: bool): number

Get the last valid value of x.

sumbars ​

sumbars(a: number, b: number): number

Get the period number of a plus b until a is greater than or equal to b.

hod ​

hod(x: number, n: number): number

Get the rank of the current value of x among the highest values in n periods. Returns 1 when the current value is the highest.

lod ​

lod(x: number, n: number): number

Get the rank of the current value of x among the lowest values in n periods. Returns 1 when the current value is the lowest.

avedev ​

avedev(x: number, n: number): number

Get the average absolute deviation of x in n periods.

devsq ​

devsq(x: number, n: number): number

Get the sum of the squares of the deviations of x in n periods.

forcast ​

forcast(x: number, n: number): number

Get the n period linear regression forecast value of x.

slope ​

slope(x: number, n: number): number

Get the n period linear regression slope of x.

std ​

std(x: number, n: number): number

Get the n period standard deviation of x.

stddev ​

stddev(x: number, n: number): number

Get the n period standard deviation of x.

stdp ​

stdp(x: number, n: number): number

Get the n period standard deviation of x.

svar ​

svar(x: number, n: number): number

Get the n period sample variance of x.

varp ​

varp(x: number, n: number): number

Get the n period total variance of x.

covar ​

covar(x: number, y: number, n: number): number

Get the n period covariance of x and y.

relate ​

relate(x: number, y: number, n: number): number

Get the n period correlation coefficient of x and y.

sar ​

sar(n: number, s: number, m: number): number

Get the parabolic SAR of n periods, s is the step length, m is the maximum step length.

sarturn ​

sarturn(n: number, s: number, m: number): number

Get the parabolic SAR of n periods, s is the step length, m is the maximum step length. If the SAR turns up, return 1, if the SAR turns down, return -1, otherwise return 0.