/*backtest
start: 2021-05-08 00:00:00
end: 2022-05-07 23:59:00
period: 4h
basePeriod: 15m
exchanges: [{"eid":"Binance","currency":"BTC_USDT"}]
*/

//@version=5
indicator(title='Super trend B', overlay=true)

length = input.int(20, minval=1)