NAMO data is weird

I think you don't understand how the McLellan Oscillator is calculated, and the difference between a market-cap-weighted index and the how advancing and declining issues are (mostly) equal weight.

Don't guess on what it means - backtest to see if your guess has any edge.
 
What to backtest? LOL.
I have 30 years trading experience and I check NAMO everyday.It is always on a big up day NAMO is up and big down day NAMO is down.
I said I have never seen it before and you want me to backtest?
How do you backtest something that never happens before?
 
Last edited:
So Namo goes up and index goes down - that's easy enough to backtest and determine how many times it has happened before.

It won't be "never happened before"

Do you even backtest bro?
 
jharmon said:
So Namo goes up and index goes down - that's easy enough to backtest and determine how many times it has happened before.

It won't be "never happened before"

Do you even backtest bro?
More...

I believe what wmwmw is stating is that he has been looking at the MAMO for 30 years, and has never seen anything like what has happened on Friday, with the MAMO up and the index down.

If that is totally true, then a backtest would show the same result. His 30 years of watching the MAMO is the same as a backtest. There's no need to do it, because his memory IS the backtest.
 
Overnight said:
I believe what wmwmw is stating is that he has been looking at the MAMO for 30 years, and has never seen anything like what has happened on Friday, with the MAMO up and the index down.
More...

Just because someone says he's "never seen it before" and "has 30 years trading experience" is a basic "false authority/appeal to authority/appeal to accomplishment" logic fallacy.

Overnight said:
His 30 years of watching the MAMO is the same as a backtest. There's no need to do it, because his memory IS the backtest.
More...

Oh, but there is a need to do it.

This has happened 7 times in the last 2 years alone which I've determined through about five minutes of coding. Obviously there may be some differences between data sources and I freely admit that my code may contain errors. I post it here for others to test/replicate/critique rather than making sweeping statements about it.

Code: 
import norgatedata
import pandas as pd

indexticker = '$COMP'
advancingissuesticker = '#NASADV'
decliningissuesticker = '#NASDEC'

timeseriesformat = 'pandas-dataframe'
start_date = pd.Timestamp('2020-01-01')
indexdata = norgatedata.price_timeseries(indexticker,start_date=start_date,timeseriesformat=timeseriesformat)

# Search for a situation
# "Nasdaq was down 137 points yet NAMO was up."

indexdata['chg'] = indexdata.Close - indexdata.Close.shift(1)
indexdata.drop(columns=['Open','High','Low','Volume'],inplace=True)

# Add in A/D data
adv = norgatedata.price_timeseries(advancingissuesticker,start_date=start_date,timeseriesformat=timeseriesformat)
dec = norgatedata.price_timeseries(decliningissuesticker,start_date=start_date,timeseriesformat=timeseriesformat)

# Cleanup colummns
adv.drop(columns=['Open','High','Low','Volume'],inplace=True)
dec.drop(columns=['Open','High','Low','Volume'],inplace=True)
adv.rename(columns={'Close':'adv'},inplace=True)
dec.rename(columns={'Close':'dec'},inplace=True)

# Merge A/D data into index data
indexdata = pd.merge(indexdata, adv, how="left", left_index=True, right_index=True)
indexdata = pd.merge(indexdata, dec, how="left", left_index=True, right_index=True)

# Calc McOsc for Nasdaq
indexdata['mcosccalc'] = 1000 * (indexdata.adv - indexdata.dec) / (indexdata.adv + indexdata.dec)
indexdata['mcosc'] = indexdata.mcosccalc.ewm(span=19,adjust=False,min_periods=19).mean() - indexdata.mcosccalc.ewm(span=39,adjust=False,min_periods=39).mean()
indexdata['mcoscchg'] = indexdata.mcosc - indexdata.mcosc.shift(1)

# Find "Nasdaq was down 137 points yet NAMO (Nasdaq McClellan Oscillator) was up."
# To prove/disprove "I have never seen this before." by wmvmw

indexdata['wmvmw'] = ((indexdata.chg <= -137) & (indexdata.mcoscchg > 0))

# Show those rows that satisfy the condition
print (indexdata[indexdata['wmvmw']])

Output:

Code: 
                  Close         chg     adv     dec   mcosccalc      mcosc   mcoscchg  wmvmw
Date
2020-03-20   6879.520020 -271.060059  1307.0  2017.0 -213.598068 -49.251003   2.724048   True
2020-09-16  11050.469727 -139.850586  2046.0  1358.0  202.115158  10.166898  10.642873   True
2020-11-09  11713.780273 -181.450195  2373.0  1202.0  327.552460  31.498248  13.775218   True
2020-11-10  11553.860352 -159.919922  2133.0  1393.0  209.869537  37.234422   5.736174   True
2021-03-08  12609.160156 -310.990234  2007.0  2080.0  -17.861511 -57.224157   6.734503   True
2021-04-14  13857.839844 -138.259766  2292.0  1885.0   97.438354  -3.683592   6.163399   True
2021-09-17  15043.969727 -137.950195  2238.0  2209.0    6.521250  -2.064219   2.165337   True
 
jharmon said:
Code: 
                  Close         chg     adv     dec   mcosccalc      mcosc   mcoscchg  wmvmw
Date
2020-03-20   6879.520020 -271.060059  1307.0  2017.0 -213.598068 -49.251003   2.724048   True
2020-09-16  11050.469727 -139.850586  2046.0  1358.0  202.115158  10.166898  10.642873   True
2020-11-09  11713.780273 -181.450195  2373.0  1202.0  327.552460  31.498248  13.775218   True
2020-11-10  11553.860352 -159.919922  2133.0  1393.0  209.869537  37.234422   5.736174   True
2021-03-08  12609.160156 -310.990234  2007.0  2080.0  -17.861511 -57.224157   6.734503   True
2021-04-14  13857.839844 -138.259766  2292.0  1885.0   97.438354  -3.683592   6.163399   True
2021-09-17  15043.969727 -137.950195  2238.0  2209.0    6.521250  -2.064219   2.165337   True
More...

Then code an algo to take advantage of his flaws, make millions of dollars and retire. Holy shit dude! Where's your journal on ET?!?
 
Overnight said:
I believe what wmwmw is stating is that he has been looking at the MAMO for 30 years, and has never seen anything like what has happened on Friday, with the MAMO up and the index down.
An and
If that is totally true, then a backtest would show the same result. His 30 years of watching the MAMO is the same as a backtest. There's no need to do it, because his memory IS the backtest.
More...

No, no,you understood wrong again.
There were days that market were down and NAMO is up.
But I have never seen a BIG down day like Friday and NAMO was up.
 
wmwmw said:
No, no,you understood wrong again.
...
But I have never seen a BIG down day like Friday and NAMO was up.
More...

AGAIN? I've never interacted with your shit before. And since that is your attitude...

Cry havoc, and let slip the dogs of war!
 
You must log in or register to reply here.
Back
Top