Much better doing synt. index with minimal dispersion from all symbols from EFT and trade this estimation. For pair trading you should keep your position from several days till several weeks
%% Long short+ inverses are like coffee/2nd law of thermodynamics; coffee COOLS/lol; Good hot coffee today+ TECS SQQQ......... Most long short funds\etfs dont do anywhere near as good as SPY/QQQ. WHY=uptrend bias in stock market for 200+ year$ Another reason QQQ is priced in $300; sqqq less than $30.................................