/*backtest
start: 2022-05-03 00:00:00
end: 2022-05-09 23:59:00
period: 5m
basePeriod: 1m
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

//@version=5
indicator("3EMA ", overlay=true)

short = input.int(20, "短期均线")