Gravestone doji has formed as the last candle on the trading week, so you have to take into consideration the gravestone doji could not be valid just because it was the last candle meaning there was not really many trader's active.
I am expecting a decline in uk100 so after a bullish move I'm just looking for opportunities to jump back into a bearish trade, UK100 is currently at a resistance level also as you can see, wait for next candle to be bearish + break off the counter trend for opportunity to for entry