The formulas for fractals are:
Bearish Fractal=
​High(N)>High(N−2) and
High(N)>High(N−1) and
High(N)>High(N+1) and
High(N)>High(N+2)
​
Bullish Fractal=
​Low(N)<Low(N−2) and
Low(N)<Low(N−1) and
Low(N)<Low(N+1) and
Low(N)<Low(N+2)
​
where:
N=High/low of the current price bar
N−2=High/low of price bar two periods
to the left of N
N−1=High/low of price bar one period
to the left of N
N+1=High/low of price bar one period
to the right of N
N+2=High/low of price bar two periods
to the right of N