hey faultyboy..... unless your talking 3 successive gap ups, the open is seldom higher than the prior close..... forex charts are bid only style, which appear somewhat different than standard stock charts..... for the sell part, surely thats a typo ">", most likely you meant "<"....
you mentioned indicator but the placing trades part suggests a ea..... that should be quite easy.....
will work on it today..... 3 higher highs = buy and 3 lower lows = sell.....
and also with your exact rules, open > prior open && prior high......
with all the standard inputs ie, stoploss, trailingstop, profittarget, moneymanagment and such included.......h