Need pi backtesting code for folling statergy

Algos, strategies, code
1

Hi, can you please write a trade script for the follg strategy: buy if the following condition is satisfied: 1. when price close abv 210 ema in 5 min time frame sell if the following condition is satisfied: 1.when price close below 210 ema in 5 min time frame

2

For the above condition use 5 minute time frame

Buy Script:

CLOSE > EMA(CLOSE,210)

Sell Script:

CLOSE < EMA(CLOSE,210)
3

This code is not working in backtest in pi