pls put 15$ SL from the price which you have taken the position. vice versa. ( example ) if you have taken a SELL position at price 1400 .. your SL should be 1415. and if you have taken a buy position your SL should be 1485. this is how you have to maintain your SL for any sudden fall or shoot up. ( like how Brexit time happened ).. Iran, Yemen, Trade war .. will ignite this sudden fall or shoot up.. so be prepared for it.. rest all remains same as 4$ rule.