缺口交易者（需要一些关于亏损交易的建议） (Gap Traders out there (need some advice )

hey folx ...

i just testing (on demo) a gap trading strategy .. which simply follows the spikes on opening and then short/long back to the gap (usually i go for between 40 and 70% of the gap size .. this is very much depending on previous days

i managed to double the money in just 6 days (not kidding .. put on 700USD .. todays it 1560USD) .. however i did not loose yet.

the problem is "how to manage loosing trades" ... what rules would you choose.

on my live accounts i use cTrader and simply ajust the lot size so it always is not more then 2%
but on this kind of trades this is not really possible .. as i hard buying against the price rise or drop (depending on gap up or down)

basically it works like this
lets a assume a Partial Gap UP with 25 Points.

however on opening the price usually does rise VERY FAST upwards ..
every time it does slow down or i see a Bearish Candle in the Tick chart .. i go short
usually this happens 2 or 3 times until the price actually starts to drop .. so the first 2 Shorts will be large in Minus until that happens.

well large is relative .. but i think you get the idea

attached is a screenshoot from yesterday where you can see what i mean
all position will open largely negative exept of the last one (which is fine for me ... as its supposed to be like this)

however if i falsely catch into a "gap-and-go" this would end very badly ..

so i guess the main question is .. how can i safely identify a true Gap-and-go from a retracement Gap in a matter of seconds ..
and where would you accept the decition to buy into the gap was wrong and reverse ?

i had it 2 times where it took 4 hours for the gap to close and i had a 32% drawdown on that day, however .. everything went like planned in the end .. and i got my profit.

but how do i know that ?
is there any candle formation or behavour i could look for to confirm its a gap-and-go or it will just take some time till the retrace does happen ?