ignore the HIGHS. you will just drive yourself insane always checking and hoping for highs.. no one knows or can tell you how high or when high..
however there is both math and psychology that backs up the LOWS.. its called the cost of obtaining limit. (only stupid sell below the cost they obtained it)
bitcoins hashrate at january 2017 was only 2.5exa hash with ASICS average price being $2k. and
calculating the number of asic units and the electric and spreading the unit costs.. brought the COST to mine btc to $700+
bitcoins exchange price LOW was ~$900 ($700 value + $200 speculation hype)
skip forward 6 months
bitcoins hashrate at july 2017 hashrate was 6exa.. with ASICS average price being $2k. and
calculating the number of asic units and the electric and spreading the unit costs.. brought the COST to mine btc to $1680
bitcoins exchange price LOW was ~$1990 ($1680 value + $310 speculation hype)
decembers hype was not sustainable. and would never have lasted and not many people actually got to be online to take advantage of the temporary bubble and correction event.. which is another reason to not fuss over th hype bubbles because they happen so fast 99% of people just cry they missed out. so dont worry or car about it..
moving forward lets take july 2018
at this point ASIC unit cost dropped to $850 (waa $2k a unit)
bitcoins hashrate at june 2018 hashrate was 36exa.. with ASICS average price being $850. and
calculating the number of asic units and the electric and spreading the unit costs.. brought the COST to mine btc to $5570
bitcoins exchange price LOW was ~$5850 ($5570 value + $280 speculation hype)
this math is not to be taken literally as a daily scale.. as people do not sell instantly. its best to get the months low hashrate and treat that as the months price LOW once calculated.
weekly/daily/hourly do not work out as correlated as people are random about when they finally sell coins
so take a months overview and take the lowst hashrate you see and the highest. to see the area/zone of break even
https://www.blockchain.com/en/charts/hash-rate?timespan=30days37exa(28th july)-54exa (11th aug)
so now look at this months low of 37exa and this months top of 54exa.. you will see a range of $5.7k-$8k for the month. and now guess what the high and low bitcoin PRICE swing was for this month.. yep $5.7k-$8k
magic right... nope. its math and social conscience of nevr selling at a loss
now you can be left to look at the hashrate chart and draw some lines on the hashrate chart and it may hlp you better define where the LOWS may settle