(*backtest
start: 2018-11-04 00:00:00
end: 2018-11-30 00:00:00
period: 5m
exchanges: [{"eid":"Futures_BitMEX","currency":"XBT_USD"}]
args: [["TradeAmount",100,126961],["ContractType","XBTUSD",126961]]
*)
DIR1:=ABS(CLOSE-REF(CLOSE,N));
VIR1:=SUM(ABS(CLOSE-REF(CLOSE,1)),N);
ER1:=DIR1/VIR1;